Blog - Swapnil Saurav

Machine Learning Python Programming

Apr 1 2023

Download software and make it ready for programming.. refer this link

#1. Python programming-  Python interpreter (python.org)
#2. Data analytics - desriptive stats
#3. Python visualization
#4. Database & SQL (OLTP)
#5. Inferential stats
#6. warehousing (OLAP)
#7. machine learning (using Python)
#8.Visualization using Power BI  ====>
#9. Machine learning using R programming
#10. Intro Tableau
# each topic will have a project
#assignments - they will not have code
# go through job description of the jobs you are interested in and put them in an excel
# you X against topics you know

#how to build your resume/profile
###################
# 1. Software to install: Python interpreter from Python.org
# 2. IDE - Integrated Development Environment
##  pycharm, vs code, jupyter, colab (online)
print("Hello Everyone",end=". ");  #this is comment which will not be executed by Python.
print("wiefsisdkjnsjdosidviosdosdiv");
print("Hello","How are you?","I am fine");print("5+4=",5+4,"another equation: 6+4=",6+4)
# f-string (format string)
print(f"5+4={5+4} another equation: 10/3={10/3:.2f}",end="")
#data type-what kind of value is it? - integer(int), float, complex,string (str), boolean(bool)
print()
var1=5  #<class 'int'>
print(type(var1))
var1="HEllo"
print(type(var1)) #<class 'str'>
var1=5.0  #<class 'float'>
print(type(var1))

var1=5j  #<class 'complex'>
print(type(var1))
print(var1 * var1)

#bool
var1 = True  #False
print(type(var1))
var1= "true"

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Uncategorized

Mar 21 2023

SQL Programming - Sessions

select * from hr.employees;

Select first_name, last_name, email from hr.employees;

Select first_name, last_name, email,salary from hr.employees where salary > 7000;

select first_name || ‘ ‘ ||last_name “FULL NAME”, email “EMAIL ID”,salary from hr.employees where salary > 7000;

Select first_name name, last_name last,salary, DEPARTMENT_ID from hr.employees where salary > 7000 and DEPARTMENT_ID=100;

Select first_name name, last_name last,salary, DEPARTMENT_ID from hr.employees where salary > 7000 or DEPARTMENT_ID=100;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where COMMISSION_PCT IS NOT NULL;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where COMMISSION_PCT <> NULL;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID <> 100;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID <> 100 and last_name =’Tuvault’;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID <> 100 and first_name like’A%’;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID <> 100 and first_name like’%t%t%’;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID <> 100 order by first_name;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID <> 100 order by first_name desc;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID <> 100 order by DEPARTMENT_ID, first_name;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees order by COMMISSION_PCT NULLS FIRST;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees order by COMMISSION_PCT DESC

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID <> 100;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID > 100;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID < 100;

Select first_name name, last_name last,salary, DEPARTMENT_ID, COMMISSION_PCT from hr.employees where DEPARTMENT_ID = 100;

Watch Day 1 Tutorial

select * from hr.employees;

select * from dual;

— Functions that work on rows

select abs(-99), round(45.61) from dual;

select to_number(‘12345.12678′,’99999.99999’) from dual;

select ‘12345.12678’ from dual;

— 12-Jan-2023

select to_date(‘May 15, 2023 5:25 P.M.’,’Month dd, yyyy HH:MI P.M.’) from dual;

select to_char(to_date(’11 January, 2023 5:25 P.M.’,’HH Month, yyyy DD:MI P.M.’), ‘Mon dd yyyy hh:mi’) from dual;

select first_name, last_name, hire_date, to_char(hire_date, ‘Month dd yyyy hh:mi’), salary, to_char(salary,’$99,999.9′) from hr.employees;

— DECODE

select decode(5+3,9,’Correct’,’Incorrect’) from dual;

— AGGREAGATE Functions – that work on columns

select count(*), round(avg(salary)), sum(salary), min(salary), max(salary) ,DEPARTMENT_ID from hr.employees group by DEPARTMENT_ID having avg(salary) > 7000;

Video 2 Functions access here

Select * from hr.employees;

select * from hr.departments;

— Cartesian

select first_name, last_name, e.DEPARTMENT_ID, DEPARTMENT_NAME from hr.employees e , hr.departments d

select first_name, last_name, e.DEPARTMENT_ID, DEPARTMENT_NAME from hr.employees e join hr.departments d on (e.DEPARTMENT_ID=d.department_ID)

— Right Outer

select first_name, last_name, e.DEPARTMENT_ID, DEPARTMENT_NAME from hr.employees e , hr.departments d where e.DEPARTMENT_ID (+)=d.department_ID

— Left Outer

select first_name, last_name, e.DEPARTMENT_ID, DEPARTMENT_NAME from hr.employees e , hr.departments d where e.DEPARTMENT_ID =d.department_ID (+)

— FULL OUTER

select first_name, last_name, e.DEPARTMENT_ID, DEPARTMENT_NAME from hr.employees e full outer join hr.departments d on (e.DEPARTMENT_ID=d.department_ID)

— Sub query

select * from HR.employees where first_name in (select first_name from hr.employees where salary>6000)

select * from HR.employees where department_ID = (select department_ID from hr.departments where department_name=’Shipping’)

select * from HR.employees e, hr.departments d where e.DEPARTMENT_ID =d.department_ID and d.department_name = ‘Shipping’

Video Session here

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Python Programming

Mar 20 2023

Sessions with Pradyun

Follow Python Installation Steps From Here: Https://Learn.Swapnil.Pw/Python/Pythoninstallation/

Python IDEs – Https://Learn.Swapnil.Pw/Python/Pythonides/

print("HELLO")

# 1. INSTALLATION - getting your computer ready
# a. you can practice online at Google Colab (colab.reaserch.google.com)
# b. install all software on your machine -
## i. install Python : python.org and download the version of your choice
## ii. you can program on Python but its very easy to do
## iii. Another software to make it user friendly - IDE
## integrated development environment - you can practice
##  eg Pycharm (jetbrains.com), VS Code , Notebooks like Jupyter, etc

print(‘Hello’,end=“\n”);print(“Good Morning”, end=“.     \n3.”);  # end has invisible new line
print(“Hope you are doing well”,end=“\n”);

print(‘Hello’,end=“\n”)
print(“Good Morning”, end=“.     \n3.”);  # end has invisible new line
print(“Hope you are doing well”,end=“\n”)

print("HELLO", end="\n")
print("Good Morning")
# variables - we variable to store data and use it again and again when we want it

var1 = 5
# single line comment
# integer means - numbers without decimal part- includes _ve , +ve & zero

# type() - it gives the data type of the variable
print(type(var1))  # integer - int

# basic data types in Python- integer, float, string, boolean & complex
# basic = single value
print(var1)
var1 = 5.0 #float
print(type(var1))

var1 = 5+2j
print(type(var1))
print(var1 * var1)  # 25 -4 +20j
print(2j * 2j)

var1 = "7890"
print(type(var1))  # str -> string

var2 = '5.4t'
print(var2)
print(type(var2))

#bool -> boolean : True / False
var1 = True
var2 = False
print(type(var1))

### use these values/ variables
# Arithematic operations - input as numbers and output are also numbers
# +  - * /   //   **  %(modulo)
var1 = 14
var2 = 5
print(f"{var1} + {var2} : ",var1 + var2)
print("{var1} + {var2} : ",var1 + var2)
print(f"var1 + var2 : ",var1 + var2)

print(f"{var1} - {var2} : ",var1 - var2)
print(f"{var1} * {var2} : ",var1 * var2)
print(f"{var1} / {var2} : ",var1 / var2)

print(f"{var1} // {var2} : ",var1 // var2) #integer division
print(f"{var1} % {var2} : ",var1 % var2) #remainder from division
print(f"{var1} ** {var2} : ",var1 ** var2) #power- var1 to the power var2
print(f"{var1} ** {var2} : ",var1 * var1* var1*var1*var1)
# round() - round it off to the nearest integer value
###  round(5.1) = 5 , round(5.6) = 6
# floor() - rounds it off to the lowest integer value
###  floor(5.1) = 5 , floor(5.6) = 5  => similar to integer division
# ceil() - rounds it off to the higher integer value
###  ceil(5.1) = 6 , ceil(5.6) = 6

# types of variables (data types) - Basic data types - they can store only one value at a time
var1 = 5  # integer - int
var1 = 5.0 # float
var1 = 5j #complex
var1 = "5" #string - str
var1 = False #boolean - bool
# arithematic operators:  + - *  /   //  %(mod)  ** (power)
# Comparison operators: numeric as input and output is bool
num1, num2 = 10,20
print(num1, num2)
#  >   >=    <=   <   ==  !=
print("num1==10: ",num1==10) # is num1 equal to 10 ?
print("num1!=10: ",num1!=10) # is num1 not equal to 10?
print(num1 > num2)
print(num1 < num2)
print(num1 >= 10)
print(num1 <= num2)

# Logical operators
#input values and output values - are all boolean
#operations =  and  or  not
print("not True: ",not True)
print("not False: ",not False)
# and -> both values have to be True for it to be True else its False
print(True and False)
#tell: I will do this work and that work
#actual: I did only this work
#did I meet my committment ? - NO
# or - both values have to be False to be False otherwise its always True
#tell: I will do this work or that work
#actual: I did both
print("OR = ", True or False)
num1,num2 = 10,20
print("==> ",num1==10 and num1!=10 or num1 > num2  and num1 < num2 or num1 >= 10 or num1 <= num2)
# True

radius = 4
pi = 3.14
area_of_circle = pi * radius**2
circumference = 2 * pi * radius
print("Area of a circle with radius",radius,"is",area_of_circle,"square unit and circumference is",circumference,"unit")
# f - string is for formatting
print(f"Area of a circle with radius {radius} is {area_of_circle} square unit and circumference is {circumference} unit")

# Assignment -
# 1. WAP to find area and perimeter for a square
# 2. WAP to find area and perimeter for a rectangle
# for both the programs, display output is complete message as we have done above with circle.

# to check given number is an odd or even ?
# 5 - odd, 6 - even
num1 = 5
if num1 % 2==0:
    print("EVEN Number")
else:
    print("ODD Number")

num=0
if num>0:
    print(“Number is positive”)

if num>0:
    print(“Number is positive”)
else:
    print(“Number is not positive”)
num=11
if num>0:
    print(“Number is positive”)
    if num%2==0:
        print(“Its even”)
    else:
        print(“Its odd”)
elif num<0:
    print(“Number is negative”)
else:
    print(“Neither positive nor negative”)

#WAP to check if a number is Odd or Even

#WAP to assign grade based on marks obtained
avg = 85
#avg>=85: A, 70-85: B, 60-70: C, 50 to 60: D, <50- E

#LOOPS are used to repeat multiple times
#FOR – when u know exactly how many times to repeat
# range(start(=),stop(<),increment(=)) = range(5,25,5): 5,10,15,20
for counter in range(5,25,5):
    print(counter)

# range(start(=),stop(<)) = range(5,10) default increment = 1: 5,6,7,8,9
for counter in range(5,10):
    print(counter)

# range(stop(<)) = range(4) DEFAULT start= 0,default increment = 1: 0,1,2,3
for counter in range(4):
    print(counter)

#WHILE – till a condition is true
count = 10
while count<=15:
    print(“Value = “,count)
    count=count+1

for v in range(1,11):
    for r in range(1,11):
        print(f”{r:<2} * {v:<2} = {v*r:<2}“,end=”  “)
    print()

”’
    *
   * *
  * * * 
 * * * * 
* * * * *
”’
for i in range(5):
    for j in range(4-i):
        print(” “,end=“”)
    for k in range(i+1):
        print(“*”,end=” “)
    print()

############# Assignment
”’
* * * * * 
 * * * * 
  * * * 
   * * 
    * 
”’

#Guessing game: Computer v Human
import random
#guess = 25
guess = random.randint(1,100)
counter = 0
while True:
num = int(input(“Guess the number between 1 and 100: “))
if num<1 or num>100:
print(“Invalid guess, try again!”)
continue
 counter+=1
 if num==guess:
print(f”Congratulations! You got it right in {counter} attemmpts.”)
break #throw you out of the loop
 elif num<guess:
print(“Incorrect, You’re guess is lower!”)
else:
print(“Incorrect, You’re guess is higher!”)

#Guessing game: Computer v Computer
import random
#guess = 25
guess = random.randint(1,100)
counter = 0
start,end=1,100
while True:
#num = int(input(“Guess the number between 1 and 100: “))
 num = random.randint(start,end)
if num<1 or num>100:
print(“Invalid guess, try again!”)
continue
 counter+=1
 if num==guess:
print(f”Congratulations! You got it right in {counter} attemmpts.”)
break #throw you out of the loop
 elif num<guess:
print(“Incorrect, You’re guess is lower!”)
start=num+1
 else:
print(“Incorrect, You’re guess is higher!”)
end=num-1

###############
txt = “Hello”
# indexing
print(txt[0]) #counting in Python starts from zero
print(txt[4])
print(txt[-1])

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Python Programming

Feb 16 2023

Python Class with Advait

#variables are used to store some values
var1 = 50
var2 = 100
print(var1 + var2)

var1 = 500
var2 = 100
print(var1 + var2)
#Basic

#datatypes: str, int, float, bool, complex
var1 = "HELLO" # str - you have the value in quoation
print(type(var1))
var1 = 100  #without any decimal part - integer(int)
print(type(var1))
var1 = 100.0  #float value
print(type(var1))
var1 = True #bool - False
print(type(var1))
var1 = 5j  #complex (python)=imaginary (maths)
var2 = var1 * var1 #implicit conversion into complex since var1 is also complex
print(var2)
print(type(var1))
#
var1 = 100
var2 = 3.5
var3 = var1 + var2 #implicit conversion into float since var2 is a float
print()

str1 = "55"
str1 = int(str1) #explicit conversion
#int(), str(), float(), bool(), complex()
var1 = 0;var1 = bool(var1);print(var1);  #False - bool

var1 = "";
var1 = bool(var1);
print(var1) ; #False - bool


len = float(input("Enter length of the rectangle: "))
breadth = float(input("Enter breadth of the rectangle: "))
area = len * breadth
print("Area of the rectangle is ",area)
print(f"Rectangle with length = {len} and breadth = {breadth} has an area of {area:.1f}")

player = "Imbababonbeta"
country = "Zimbabwe"
position = "wicket-keeper"
print(f"Player {player:<16} plays for {country:^10} and is {position:>15} of the team")
player = "Rohit"
country = "India"
position = "captain"
print(f"Player {player:<16} plays for {country:^10} and is {position:>15} of the team")

#Player Imbababonbeta plays for Zimbabwe and is wicket-keeper of the team
#Player Rohit         plays for  India    and is       captain       of the team


########
##  OPERATORS
### ARITHMETIC OPERATORS: + - * /
## input values have to be numeric (int, float, complex)
var1 = 50
var2 = 20
print(var1 + var2)
print(var1 - var2)
print(var1 * var2)
print(var1 / var2)
#  ** power, 5 ** 4 =>  5 * 5 * 5 * 5
print(var1 ** var2)  # 50 to the power of 20

# how to find square root of 21 ?
print(21 ** 0.5)  #4.58257569495584
#cube root of 21 =
print(21 ** (1/3))

#  //  - integer division
print(10 / 3)
print("Integer Division = ",10 // 3)

# % Modulo - remainder
#20 / 3 = 6 + 2/3
print(20 % 3)
print(50 % 30) # 20 is remainder

# Comparison operators: compare the values (bigger/smaller)
# input as numeric and output is BOOL
var1 = 15
var2 = 25
print(var1 > var2)  #false

#Arithematic operations: + - * / , **, // and % (modulo)
## input as numbers and output was numbers
#Comparison operators: input are the numbers / output - bool
#  >   >=   <   <=   ==  !=
val1 = 30
val2 = 40
val3 = 30
print(val1 > val2) #is leftside val greater than rightside value?
print(val1 > val3) #False
print(val1 >= val3) #is val1 greater than or equal to? - True
print(val1 < val2)  #
print(val1 <= val3) #
print(val1 == val3)  # == is for asking question, are they equal?
print(val1 == val2)  #False
print(val1 != val3)  #False
print(val1 != val2) #True

#bool operators - Logical operators : Input and Output- bool
#Prediction 1: Sachin and Laxman are going to do this job - F
#Prediction 2: Sachin or Laxman are going to do this job - T
#Actual: Sachin and Rahul did the job

#AND - even one False will make output False
#OR - even one TRUE will make output True
#NOT - opposite

val1 = 30
val2 = 40
val3 = 30
print("==>: ",val1 > val2 or val1 > val3 and val1 >= val3 or
      val1 < val2 and val1 <= val3 or val1 == val3 and val1 == val2 or
      val1 != val3 or val1 != val2)
#T

#membership operator - in
print(5 in [2,4,5,6,8])

#bitwise operator - works by converting the numbers to boolean
# binary equivalent of 33 ?
print(bin(33))   #0b100001
print(int(0b101111011111))

# and (&) or (|)  >> (right shift)  << (left shift)
print(22 & 33)  #0
print(33 & 22)   #0
print(bin(33), bin(22))
## 33 = 100001
## 22 = 010110
##  (&) 000000
##  (|) 110111
print(int(0b110111))   #55
print(33 | 22)  # 55

##
print(55 >>2)
# 55 = 110111 >> 1 = 11011 >> 1 = 1101
print(int(0b1101))  #13
print(55 << 2)  # 110111 << 1 = 1101110 << 1 = 11011100

###
# if - checking conditions
val1 = 30
if val1 > 0:
    print("Value is positive")
    print("Positive Positive Positive")

print("Thank you for using my program")

# 300 pts
## ? 300
print("You win")
print("You lose")
print("Tied")


#TUPLE - immutable version of List
str1 = "hello"
str2 = 'Good evening' \
       'How are you?'
str3 = '''Hello there
hope you are doing good
we shall meet soon'''
str4 = """I am fine
how are you"""

print(str2)
print(str3)
print(type(str1))

#functions (global) v methods (belong to a class)
str1 = "hello"
print(str1.islower())
print(str1.isupper())
#isdigit()
val1 = input("Enter length of the rectangle: ")
if val1.isdigit():
    val1 = int(val1)
    print(val1)
else:
    print("Sorry, this is not a valid number")

name1 = "Sachin Tendulkar"
print(name1.isalpha())
txt1 = "hello@123"
print(txt1.isalnum())

###
str1 = "HellOOO how are YOU?"
print(str1.lower())


#### Build a game - guessing number  ####
import random
num = 55
attempt = 0
low,high = 1,100
while True:
    #guess = int(input("Enter the number: "))
    guess = random.randint(low, high)
    attempt+=1
    if guess ==num:
        print(f"You got it in {attempt} attempts!")
        break
    elif guess > num:
        print(f"Hint: Your value {guess} is higher")
        high=guess-1
    else:
        print(f"Hint: Your value {guess} is lower")
        low=guess+1


str1 = "Hello"
print(str1[-1] , str1[len(str1)-1])
print(str1[1])
print("Length = ",len(str1))
# range(a,b,c) - a=initial value, b = ending value, c=increment
# range(2,14,3) - 2,5,8,11
print(str1[0:4], str1[:4])
print(str1[-5:-1], str1[:-1])
# llo
print(str1[2:5], str1[2:])
print(str1[-3:])

vowel_count = 0
str1 = "This is a Sample STATEMENT to test"
for i in str1:
    #print("Hello: ",i)
    if i in 'aeiouAEOIU':
        vowel_count+=1
print(f"Total vowels in '{str1}' is {vowel_count}")

# strings are immutable
str1 = "Hello"
str1=str1[0]+'E'+str1[2:]
print("New str1 = ", str1)

str2 = "This is a Sample STATEMENT to test"
str3="This,is,a,sample,text2,work,on,it"
output1 = str2.split()
output1 = str3.split(',')
print(output1)
print(str2)
print("Index: ",str2.index('i',3,len(str2)))

str4='abcd abc ab a'
#find all indices of b
tot = str4.count('ab')
print("Total bs = ",tot)
srt = 0
for i in range(3):
    print(str4.index('ab',srt))
    srt=str4.index('ab',srt)+1


### LIST: linear ordered mutable collection
l1 = []
print(type(l1))
l1=[3,"Hello",False,5.0, [2,4,6]]

l1.append(45)


#collection - stores multiple values with single variable name
#List, Tuple, Dictionary and Set
#List - linear collection
l1 = [5,"Hello",False,[4,8,12]]
print(type(l1))   #<class 'list'>

#accessing (similar to strings)
print(l1[1][0])
print(type(l1[1]))
print(l1[-1][1])

l2 = [5.6,"Good Evening"]
print(l1+l2)
print(l2 * 3)
l3=[-1]*10
print(l3)

for i in l1:
    print(i)

for i in range(len(l1)):
    print(l1[i])

l4=[]
#read the value from the user and if its number only then add to this list
val1 = input("Enter a number: ")
if val1.isdigit():
    l4.append(int(val1))
print("After first step, L4 looks like: ",l4)

l5 = []
l5.append(100)
l5.append(200)
l5.insert(1,300)  # takes- pos, value
l5.insert(1,400)
print("After addition: ",l5)
l5.pop(2) #input as position(index)
l5.remove(200) #takes values as input
print(l5)

### Stack & Queue ##
## Stack - LIFO data structure

stack=[]
while True:
    print("Enter your options: ")
    print("1. Display Your Stack")
    print("2. Add a member to the stack")
    print("3. Remove a member from the stack")
    print("4. Exit")
    ch=input("Choice : ")
    if ch=="1":
        print("Content of the stack is:\n",stack)
    elif ch=="2":
        pass
    elif ch=="3":
        pass
    elif ch=="4":
        break
    else:
        print("Sorry I dont understand you, try again!")

# Queue: First element added is the first one to go - FIFO (First In First Out)
l6 = [100,200,300,400,100,200,300,100,200,100]
print(l6.index(100))  #element
print(l6.index(100, 2))  # element with start position
print(l6.index(100, 5,8))  # element with start and end pos
print("count = ",l6.count(200))

#Deep and Shallow copy
l7 = l6 #Deep copy - 2 names for same set of values
l8 = l6.copy() #creates a duplicate copy -
print("1. L6 = ",l6)
print("1. L7 = ",l7)
print("1. L8 = ",l8)
l6.append(500)
l7.append(600)
l8.append(700)
print("2. L6 = ",l6)
print("2. L7 = ",l7)
print("2. L8 = ",l8)

# list is linear ordered mutable collection
l6[0] = 110  #edit the value unlike string
print(l6)
l7 = [2,4,6,8,10]
print(l6+l7) #l6 and l7 retains original values
l6.extend(l7) #l6 will get l7 values
print(l6)
print("Before Reverse: ",l6)
l6.reverse()
print("After Reverse: ",l6)
l6.sort()
print("After Sort: ",l6)
l6.sort(reverse=True)
print("After Reverse Sort: ",l6)

l6.clear()
print("Last: ",l6)

str1 = "HELLO HOW ARE YOU"
print(str1.split())
print(str1)  #didnt change as it is immutable

l6.append(66)
print(l6) #existing list got changed as it is mutable

#Sequential search
list1 = [12,14,8,6,10,20,4,10,16,18,2]
num = 10
count_num=0
count_index = []
for i in range(len(list1)):
    if list1[i]==num:
        count_num+=1
        count_index.append(i)

print(f"Number of values = {count_num} and indices are: {count_index}")

# Binary Search
list1 = [12,14,8,6,10,20,4,10,16,18,2]
list1.sort()


num = 22
first = 0
last = len(list1)-1
isFound = False
while True:
    mid = (first+last) // 2
    if list1[mid] ==num:
        isFound = True
        break
    elif list1[mid] <num:
        first = mid+1
    else:
        last = mid-1
    if first> last:
        break

if isFound:
    print("Number is in the list")
else:
    print("Number is not in the list")

Q_LIST = ["What is 1+3? (a) 4 (b) 8 (c) 2 (d) 10",
          "What is 4+3? (a) 5 (b) 7 (c) 12 (d) 16",
          "What is 4*3? (a) 6 (b) 8 (c) 12 (d) 16"]
A_LIST = ["A","B","C"]
import random
q_no = random.randint(0,2)
print("Let's play the Quiz!")
print(Q_LIST[q_no])
inp=input("Your answer please (select a/b/c/d) : ")
if inp.upper() ==A_LIST[q_no]:
    print("Congratulations! You win")
else:
    print("Sorry, thats not right")

### input: 29  3  2023  output: 29th March 2023
months= ["January","February","March","April","May","June","July","August",
         "September","October","November","December"]
date_ending = ['st','nd','rd']+17*['th']+['st','nd','rd'] + 7*['th']+['st']
month_val = 3
print(months[3-1])
date = 21
print(str(date)+date_ending[date-1])

#Tuple - linear ordered immutable collection
t1 = ()
print("type 1 = ",type(t1), len(t1))

t1 = (1,)
print("type 1 = ",type(t1), len(t1))
t1 = (1,2,3,4,1,2,3,1,2,1)  #packcing
print("type 1 = ",type(t1), len(t1))
print("4th member - ", t1[3])
print("2s = ",t1.count(2))
print("Position of 3 = ",t1.index(3))
t2 = (2,4,6,8)
a,b,c,d = t2  #unpacking
print(c,d,b,a)

# you can convert tuple to list and list to tuple
t2 = list(t2)
t2 = tuple(t2)
# Tuple like String, is immutable
#advantage is - working with Tuples is faster than reading through a list

#####  DICTIONARY
# Dictionary - mutable collection of key-value pair
d1 = {}
print(type(d1))
d1 = {"Advait":[45,34,89,81],"Saurav":[12,42,23,44]}
print(d1["Advait"])
d2 = {False: 45,45:"Cricket","Name": "Sachin",10:"Zeeeero"}
# dictionary should have unique keys
print(d2)
d2.update(d1)
print("After Update: ", d2)

print("Only Keys = ",d2.keys())
print("Only Values = ",d2.values())
print("Only Items = ",d2.items())
for j in d2.keys():
    print(j," = " ,d2[j])
print("Printing Items: ")
for i,j in d2.items():
    print("Key:",i," & Value: ",j)

# to remove: pop(), popitem()
#popitem removes the last updated KEY (not value)
d3 ={1:"Hello",2:"Hola",3:"Namaste",4:"Bon Jor"}
print("D3 = ",d3)
d3.popitem()
print("After Popitem: ",d3)
d3 ={1:"Hello",2:"Hola",3:"Namaste",4:"Bon Jor",1:"Good Morning"}
print("D3 = ",d3)
d3.popitem()
print("2. After Popitem: ",d3)
d3.pop(1)
print("1. After Pop = ",d3)

actors = {"David":32,"Tim":42,"Rebecca":21,"Mary":45}
male = {"David":"LA","Tim":"NY"}
female = {"Rebecca":"SD","Mary":"WS"}
# David who is a male of 32 years lives in LA
for name in actors.keys():
    print_sentence=name +" who is a "
    for male_city in male.keys():
        if name==male_city:
            print_sentence+="male of "+str(actors[name]) +" years lives in "+ male[name]

    for female_city in female.keys():
        if name==female_city:
            print_sentence+="female of "+str(actors[name]) +" years lives in "+ female[name]
    print(print_sentence)

# $100 – $57
total_amount = 28
#initially
Rs_5 = 2
Rs_2 = 2
Rs_1 = 2+3 #initial 2 plus change of 3
initial_total = 5*Rs_5 + 2 *Rs_2 + 1*Rs_1

yet_to_be_accounted = total_amount – initial_total

print(“yet_to_be_accounted: “,yet_to_be_accounted)
# 12
Rs_5 += yet_to_be_accounted //5
yet_to_be_accounted%=5
Rs_2 += yet_to_be_accounted //2
yet_to_be_accounted%=2
Rs_1 += yet_to_be_accounted

print(“Total Rs 5 stamps = “,Rs_5)
print(“Total Rs 2 stamps = “,Rs_2)
print(“Total Rs 1 stamps = “,Rs_1)

#SETS
A = {1,5,2,6,9}
B = {6,9,11,14,15}
A.add(5)
print(A)

# LIST, TUPLE, SETS => They can be converted to each others form\
l1 = [2,4,6,8,4,6,8,2,6,8]
l1 = list(set(l1))
print(l1)

#they are returning result as a new set, values of A and B will not change
print(A.union(B))
print(A.intersection(B))
print(A.difference(B))

#___update modifies the main set
A.update(B)
print(A)
print(A.intersection_update(B))
print(A.difference_update(B))

# SET - sets - linear unordered mutable collection - doesnt allow duplicate
set1 = {'Apple','Grapes','Banana','Orange'}
print(type(set1))
set1.add('Cherry')
set2 = {"Pineapple","Mango","Apple","Orange"}
# two ways to remove
set1.remove("Banana")
set1.discard("Apple")
#set1.remove("Rose") - if value isnt there throws error
set1.discard("Rose")  #doesnt throw error
print("1. Set1: ",set1)
set1.pop()
set1.update(set2)  #union
print("2. Set1: ",set1)
set1.clear()
print("3. Set1: ",set1)
### SET FUNCTIONS  ####
set1 = {'Apple','Grapes','Banana','Orange'}
set2 = {"Pineapple","Mango","Apple","Orange"}
#UNION
print("UNION")
print(set1 | set2)
print(set1.union(set2))
print("INTERSECTION")
print(set1 & set2)
print(set1.intersection(set2))
print("DIFFERENCE")
print(set1 - set2)
print(set1.difference(set2))
print(set2 - set1)
print(set2.difference(set1))

print("SYMMETRIC DIFFERENCE")
print(set1 ^ set2)
print(set2 ^ set1)
print(set1.symmetric_difference(set2))
#update() will update the values of main set
# set1.union(set2) - this gives a new set as output
# set1.update(set2) - set1 is updated with the values
# union - update()
set1.update(set2)
print(set1)
# intersection: intersection_update()
set1.intersection_update(set2)
print(set1)
# difference_update()
set1.difference_update(set2)
print(set1)
#symmetric_difference_update()
set1.symmetric_difference_update(set2)
print(set1)

# set, list, tuple => they are inter-convertible
list1 = [3,6,9,12,3,6,9,3,6,3]
list1 = list(set(list1))
print(list1)
set1 = {'Apple','Grapes','Banana','Orange'}
set1 = list(set1)
set1.index("Grapes")
set1 = set(set1)
set1 = tuple(set1)
set1 = set(set1)
print(set1.issubset(set2))

#
list1 = [3,6,9,12,3,6,9,3,6,3]
list2 = [3,6,9,12,15]
#does all the elements of list2 present in list1?
t_list1 =set(list1)
if set(list1).issuperset(set(list2)):
    print("yes, list2 value exists in list1")
else:
    print("No, list2 has additional elements")

# MAP FILTER REDUCE
#MAP – large set of data and you want to apply same formula over all the values
list1 = [-3,-6,-15,0,5,999,67,34]
#find square of all these values
list2 = []
for i in list1:
    list2.append(i*i)
print(list2)

# one line function / lambda function

result = list(map(lambda x:x**2,list1))
print(“Map result = “,result)


# FILTER -used to filter out data from a list based on a condition
# logic of the function in filter should be designed such a way that you get either True or False
result = list(filter(lambda x:x>=0,list1))
print(“Filter result = “,result)

#filter out numbers divisible by 3
result = list(filter(lambda x:x%3==0,list1))
print(“2. Filter result = “,result)

#Reduce
#import functools as ft
from functools import reduce
result = reduce(lambda x,y:(x+y)/2, list1)
print(“3. Result from Reduce: “,result)

# function
def my_qs():
    print(“Whats your name?”)
    print(“How are you today?”)
    print(“Where do you live?”)

my_qs()

# function that doesnt take any input argument nor does it return
def mysum1():
a,b,c=10,20,30
 sum=a+b+c
print(“Sum is”,sum)
#function with input arguments
def mysum2(a,b,c): #required positional arguments
 print(“A,B and C are: “,a,b,c)
sum=a+b+c
#print(“Sum is”,sum)
 return sum

out = mysum2(9,18,27)
print(“Out =”,out)

def mysum3(a,b,c=99):  #c is default, a & b are required – positional arguments
    print(“A,B and C are: “,a,b,c)
    sum=a+b+c
    #print(“Sum is”,sum)
    return sum


out = mysum3(9,18,27)
print(“Out =”,out)

out = mysum3(9,18)
print(“Out =”,out)

# 0, 1,1,2,3,5…  fibonacci numbers


def checkvalue(a,b):
    global h
    print(“H = “,h)
    h = 99
    print(“2 H = “,h)
    if a>b:
        return (“is”,a,“a”)
    elif b>a:
        return (“is”,b,“b”)
    else:
        return (“not”,)
h=100
result =checkvalue(10,20)

if result[0]==“not”:
    print(“Both values are equal”)
else:
    print(f”Variable {result[2]} with value {result[1]} is greater”)

# Session on MODULES

#Create a python file with name p2.py and paste below programs there

#Functions
# positional and required
# keyword
# default values
# variable length arguments
def mysum1(a,b):
return a+b

def mymultiple(a,b):
print(“a * b = “,a*b)

def my_sample_func(a,b,c):
print(“A,B,C = “,a,b,c)

def myfunc1(*nums,**details):
“””This is a sample function to demonstrate working of a variable length parameters
 Input:
 nums: will take all the values as tuple. it can be empty as well
 details: store all keyword arguments like a dictionary
 Return:
 doesnt return anything”””
 print(type(nums), type(details)) #tuple, dictionary
 for i in nums:
print(i,end=“, “)
print()
for k,v in details.items():
print(k,v)


if __name__ == “__main__”:
myfunc1(23,21,14,12,15,26,name=“Sachin”,age=49,place=“Mumbai”)

myfunc1(name=“Sachin”,age=49,place=“Mumbai”)

#DocString – this is

 print(print.__doc__)
print(“===”)
print(input.__doc__)
print(“===”)
print(myfunc1.__doc__)

#Run below programs from different file

#import p2 as Amazing
from p2 import mymultiple, my_sample_func

#decorators

def my_main():
    ”’ Example  of a function inside a function”’
    print(“First line in function”)
    def my_subfunc():
        print(“First line inside sub func”)
    print(“Second line in main function”)
    my_subfunc()
    print(“Third line in main function”)
    my_subfunc()
    print(“4th line in main function”)
my_main()

def my_fun2():
    print(“First line from my_fun2”)

def my_fun3():
    print(“First line from my_fun3”)

def my_fun1(var):
    print(“First line from my_fun1”)
    var()


if __name__ ==“__main__”:
    mymultiple(10,20)
    my_sample_func(10,50,80)

    #calling my_fun2 from my_fun1
    my_fun1(my_fun2)  #passing function name as parameter
    #calling my_fun3 from my_fun1
    my_fun1(my_fun3)  # passing function name as parameter

#Recursive functions – they call themselves
import time
def myfacto(n):
    if n ==1:
        return 1
    return n * myfacto(n-1)

start1 = time.time()
out = myfacto(9)
end1 = time.time()
print(“Factorial of 10 is: “,out)
print(“Total time taken by recursion is:”,(end1-start1))

def myfacto2(n):
    prod = 1
    for i in range(1,n+1):
        prod*=i
    return prod
start2 = time.time()
out = myfacto2(9)
end2 = time.time()
print(“Factorial of 10 using Loops is: “,out)
print(“Total time taken by loop is:”,(end2-start2))

import random
var1 = random.randint(1,100)
print(“random number = “,var1)
print(“random number- between 0 and 1: “,random.random())
list1 = [1,2,3,4,5,6]
list2 = [“Apple”,“Banana”,“Cherry”,“Grapes”,“Guava”,“Mango”]
print(“Rolling the dice: “,random.choice(list2))

from datetime import date,datetime,time,timedelta,timezone, tzinfo
from pytz import timezone
#import datetime
print(“Current time = “,datetime.now())
print(“Yesterdat time = “,datetime.now()-timedelta(days=1))
print(“Today’s date: “,datetime.now().strftime(‘%Y-%m-%d’))
print(“This Month: “,datetime.now().month)
date_utc = datetime.now().replace(tzinfo=timezone(‘UTC’))
print(date_utc)
date_utc = datetime.now().replace(tzinfo=timezone(‘Asia/Kolkata’))
print(date_utc)
date_utc = datetime.now().replace(tzinfo=timezone(‘US/Eastern’))
print(date_utc)

# properties we mean – methods (functions) and variables
# class and object levels

class Books:
    num_of_books = 0  #class variable

    def __init__(self,title=“”,author=“”):   #object method
        self.title=title       #object variable
        self.author=author
        Books.num_of_books+=1

    def display_book(self):
        print(“Title of the book is”,self.title)
        print(“Author of the book is”,self.author)
        print(“Total books created is”,Books.num_of_books)

    @classmethod
    def display_classdetails(cls):
        print(“Total number of books =”,cls.num_of_books)

b1=Books(“Python Programming”,“Swapnil Saurav”)
#b1.create_book()
b1.display_book()
b2=Books(“Machine Learning”,“Saurav”)
b3=Books(“Retail Management”,“Swapnil”)
b4=Books(“Data Visualization”,“Swapnil”)
#b2.create_book()
b2.display_book()
b1.display_book()
b3.display_classdetails()
b4.display_classdetails()
b1.display_classdetails()
Books.display_classdetails()
b3.display_book()

# add and subtract

class MyMasthsOps:
    def __init__(self,a,b):
        self.num1 = a
        self.num2 = b
    def addition(self):
        return self.num1 + self.num2
    def subtraction(self):
        return self.num1 – self.num2

op1 = MyMasthsOps(10,5)
print(“Addition: “,op1.addition())
print(“Subtraction: “,op1.subtraction())

#Class and Objects
class Cart:
    items_in_store=[{“item_code”:“100”,“Item_Description”:“Blue color Shirt”,“Cost”:40},
                    {“item_code”:“101”,“Item_Description”:“Chips Packet”,“Cost”:2},
                    {“item_code”:“102”,“Item_Description”:“Chocolate Royal”,“Cost”:5},
                    {“item_code”:“103”,“Item_Description”:“Bread Big packet”,“Cost”:7},
                    {“item_code”:“104”,“Item_Description”:“Shoes 9C”,“Cost”:30},
                    {“item_code”:“105”,“Item_Description”:“Carry Bag 9in”,“Cost”:70},
                    {“item_code”:“106”,“Item_Description”:“Pen Blue Rey”,“Cost”:10}]
    def __init__(self):
        self.list_of_items=[]

    def add_item(self):
        available =“N”
        temp_dict = {“item_code”:“”,“item_desc”:“”,“price”:0,“quantity”:0}
        icode= input(“Enter the item code: “)
        for item in Cart.items_in_store:
            if icode ==item[‘item_code’]:
                available = “Y”
                temp_dict[‘item_code’] = item[‘item_code’]
                temp_dict[‘item_desc’] = item[‘Item_Description’]
                temp_dict[‘price’] = item[‘Cost’]

        if available==“Y”:
            quan = int(input(“Enter the quantity:”))
            temp_dict[‘quantity’] = quan
            self.list_of_items.append(temp_dict)
            print(“Item has been added to your shopping cart!”)
        else:
            print(“This item is not available right now!”)

    def display_items(self):
        for item in self.list_of_items:
            print(item)
    def mainmenu(self):
        print(“Main Menu:”)
        print(“1. Add Item to the Cart”)
        print(“2. Remove Item from the Cart”)
        print(“3. Display the content of the cart”)
        print(“4. Exit”)
        choice=input(“Enter your choice: “)
        return choice

if __name__ == ‘__main__’:
    cart1 = Cart()
    while True:
        ch = cart1.mainmenu()
        if ch==“1”:
            cart1.add_item()
        elif ch==“2”:
            pass
        elif ch==“3”:
            cart1.display_items()
        elif ch==“4”:
            break
        else:
            print(“Invalid Option, try again!”)

# CRUD – Create new data, Read existing data, Update (edit the existing data) & Deleting existing data
# RDBMS – relational database management system
# database structure – logical (how we use the database) and physical (actual files that are saved)
# DBA, Database Developers & Database Architect
# DBA – installing and making sure that the databases are up and running

# OLTP (Online Transaction Processing) v OLAP (Online Analytical Processing)
## CRUD – C, U,D=80%, 20% R v 99% – reading

# Table: Students
# ROLLNO NAME GRADE EMAILID PHONE
# 1 Sachin 5 sa@sa.com 123
# 2 Laxman 7 lax@lax.com 231

# Table: Competitions
# COMPID NAME DOC ORG CONTACTNO


#Table: STUDENTCOMPETITIONS
# ID ROLLNO COMPID RANK

class Library:
book_count = 0 #class level variable

 # __init__() is automatically called when you create the object
 def __init__(self,title,author,price): #object level method
 self.title = title #object level variable
 self.author = author #object level variable
 self.price = price #object level variable
 self.copies = –1
 Library.book_count +=1 #Library.book_count = Library.book_count + 1

 def print_info(self):
print(” Printing Book Info”)
print(“———————-“)
print(“Title = “,self.title)
print(“Author = “,self.author)
print(“Price = “,self.price)

def set_copies(self,copies=10):
self.copies = copies

def get_copies(self):
print(f”Total copies available for the book {self.title} is {self.copies}“)
return self.copies

b1 = Library(“Strangeness”,“George”, 13.50)
b2 = Library(“Python”,“Swapnil”, 19.50)
b3 = Library(“Machine Learning”,“Advait”, 33.50)


print(b1.book_count)
print(b2.book_count)
print(b3.book_count)
print(Library.book_count)
print(b1.title)
print(b2.title)
print(b3.title)
b3.print_info()
b2.set_copies(7)
b2.get_copies()
if b1.get_copies() <0:
b1.set_copies(5)
b1.get_copies()

Class Calculation
1. use init to assign two variables
2. def add(self) , def sub(self), def mul(self), def div(self)

##Main Program
input a and b
c1 = Calculation(a,b)
create: def menu()

# Exceptions
# example 1: ValueError – when u convert non number to integer

”’
1. Syntax error:
print(“Hello) #SyntaxError: unterminated string literal (detected at line 7)

2. Logical Error: Sum of two numbers
a,b = 4,5
print(a*b)

3. Exceptions: Runtime error
1. int(‘n’) # ValueError: invalid literal for int() with base 10: ‘num’
ZeroDivisionError: division by zero

”’
#WAP to input two numbers and perform their division
try: #try block is used to check the exception
 num = int(input(“Enter the numerator: “))
except ValueError: #if there is ValueError, code comes here
 print(“You have given an invalid number, resetting it to zero”)
num = 0

except Exception: # if previous exception not valid then it comes here
 print(“Sum error has occurred. Exiting the program”)
exit(0)
else: # if there is no error, then comes to else (not mandatory)
 print(“You are doing good. No error so far!”)
finally: # error or no error, this is called. again its not mandatory
 print(“You are doing good.”)

try:
dem = int(input(“Enter the denominator: “))
except ValueError: #if there is ValueError, code comes here
 print(“You have given an invalid number, resetting it to one”)
dem = 1
try:
div = num/dem
except ZeroDivisionError:
print(“Denominator cant be zero!!! We are terminating the program”)
else:
print(“Division of given values is”,div)

# WAP to input and divide two numbers
try:
num = int(input(“Enter the numerator: “))
dem = int(input(“Enter the denominator: “))
divide = num/dem
except ValueError:
print(“Sorry, we cant move ahead because of the invalid number”)

except ZeroDivisionError:
print(“Sorry, we cant move ahead because we cant handle zero as denominator”)
else:
print(“Answer is”,divide)
finally:
print(“thank you for using our calculator. See you soon…”)

# WAP to input and divide two numbers

try:
    num = int(input(“Enter the numerator: “))
    dem = int(input(“Enter the denominator: “))
    divide = num / dem

except ValueError:
    print(“Invalid number”)
except Exception:
    print(“Some error has occurred. We need to stop”)
else:
    print(“Answer is”,divide)
finally:
    print(“thank you for using our calculator. See you soon…”)

## Another approach
# WAP to input and divide two numbers
while True:
    try:
        num = int(input(“Enter the numerator: “))
    except ValueError:
        print(“Invalid number”)
    else:
        break

while True:
    try:
        dem = int(input(“Enter the denominator: “))
    except ValueError:
        print(“Invalid number”)
    else:
        if dem ==0:
            print(“Denominator cant be zero, enter again!”)
        else:
            break

divide = num/dem
print(“Answer is”,divide)

## Another approach using our own class
# WAP to input and divide two numbers

#creating by own exception
class ZeroValueError(Exception):
    def __init__(self,value):
        self.val = value

while True:
    try:
        num = int(input(“Enter the numerator: “))
    except ValueError:
        print(“Invalid number”)
    else:
        break

while True:
    try:
        dem = int(input(“Enter the denominator: “))
        if dem ==0:
            raise ZeroValueError(dem)
    except ValueError:
        print(“Invalid number”)
    except ZeroValueError as zde:
        print(f”Denominator cant be {zde.val}, enter again!”)
    else:
        break

divide = num/dem
print(“Answer is”,divide)

#Another approach using Assert method
# WAP to input and divide two numbers

while True:
    try:
        num = int(input(“Enter the numerator: “))
    except ValueError:
        print(“Invalid number”)
    else:
        break

while True:
    try:
        dem = int(input(“Enter the denominator: “))
        if dem ==0:
            assert (dem!=0),“Denominator cant be zero, lets stop!”
    except ValueError:
        print(“Invalid number”)
    except AssertionError:
        print(“Dont give zero for denominator”)
    else:
        break

divide = num/dem
print(“Answer is”,divide)

# Files – txt, csv
# r (read mode): only reading, file must be there
# w (write mode): only writing, file needn’t be there (it will be created), previous content gets deleted
# a (append mode): only writing, added on the previous content
# relative path: will not have drive name, can start with / or \\
# absolute path: will start with drive name
filename = “MyPoem.txt”
filename2 = “c:/myfolder/Myfile.txt”
# if file isnt there for read mode:
# FileNotFoundError: [Errno 2] No such file or directory: ‘/MyPack1/MyPoem.txt’
fileobj = open(filename,“w”)

fileobj.close()

”’
Reading & Writing txt files. Modes in which you can open a txt files:
1. r – reading (you cant write to it)
2. w – writing (this will delete previous content and add the new content only)
3. a – append (old data will be ratained and new data is added below)
4. r+ – reading and writing
5. w+ – writing and reading
6. a+ – writing and reading

operations:
reading: read(), readline(), readlines()
writing: write(), writelines()

1. Open the file using a handle to the object
2. whatever you want to do – read/write/
3. Close the file

Absolute path: complete path, with the drive letter:  D:\\Files\\file.txt
Relative path: path is mentioned with respect to the python file which has the code: /data/abc.txt

”’

file=“MyLearn.txt”
try:
    fileobj = open(file,“r”)
except FileNotFoundError:
    fileobj1 = open(file, “w”)
    fileobj1.close()
    fileobj = open(file, “r”)

content = fileobj.read(10)
print(content)
#seek() – instruction to go to a perticular position
#fileobj.seek(1)  #goes to the beginning of the content
content1 = fileobj.readline()
print(“Content after readline:\n“,content1)

# read whats for H?
fileobj.seek(0)
content2 = fileobj.readlines()
print(content2)
character = “B”
for sentence in content2:
    if sentence[0]==character:
        print(sentence)

fileobj.close()

fileobj = open(file,“a”)
inp_content=”’
L: Lion
M: Monkey
N: Needle
O: Opal
P: Peach
”’
fileobj.write(inp_content)
inp_content2 = [‘Q: Queen\n‘,‘R: Rain\n‘,‘S: Ship\n‘,‘T: Teapot’]
fileobj.writelines(inp_content2)
fileobj.close()

### Writing usage
file=“MyLearn.txt”
fileobj = open(file,“a”)
inp_content=”’
L: Lion
M: Monkey
N: Needle
O: Opal
P: Peach
”’
fileobj.write(inp_content)
inp_content2 = [‘Q: Queen\n‘,‘R: Rain\n‘,‘S: Ship\n‘,‘T: Teapot’]
fileobj.writelines(inp_content2)
fileobj.close()

”’
1. Read from the diary
2. Write to the diary

2.
11-JUNE-2023: Today we had singing practice at school

1. 
Which date: 11-JUNE-2023
Output: Today we had singing practice at school

”’

import csv
file = “MyData.csv”
fileobj = open(file, mode=“a”, newline=“”)
csvwriter = csv.writer(fileobj, delimiter=“,”,quotechar=‘”‘,quoting=csv.QUOTE_MINIMAL)
while True:
    content = []
    name=input(“Enter your name:”)
    content.append(name)
    city=input(“Enter your city: “)
    content.append(city)
    score=input(“Enter your score:”)
    content.append(score)
    csvwriter.writerow(content)
    ch=input(“Enter any value to continue adding:”)
    if len(ch)==0:
        break
fileobj.close()

”’ Reading the data from the CSV file”’
fileobj = open(file)   # default mode is reading (r)
csvreader = csv.reader(fileobj,delimiter=“,”)
total = 0
for each_row in csvreader:
    total+=int(each_row[2])
print(“Total = “,total)

#CSV files reader / writer
# name
# lastname, firstname
import csv
filename = “FruitProduction.csv”
fileobj = open(filename,“w”,newline=“”)
writerobj = csv.writer(fileobj, delimiter=“,”,quotechar=‘”‘,quoting=csv.QUOTE_MINIMAL)
first_row = [‘Year’,‘Apple’,‘Banana’,‘Mango’,‘Oranges’]
second_row = [‘2023’,65,34,29,56]
third_row = [‘2022’,45,29,23,45]
forth_row = [‘2021’,39,29,19,25]
writerobj.writerow(first_row)
writerobj.writerow(second_row)
writerobj.writerow(third_row)
writerobj.writerow(forth_row)
fileobj.close()

fileobj = open(filename)  #default read mode
readerobj = csv.reader(fileobj,delimiter=‘,’)
for row in readerobj:
    print(row)
fileobj.close()
fileobj = open(filename)
#1. Show to Apple production for last 3 years
readerobj = csv.reader(fileobj,delimiter=‘,’)
print(“Apple production were:”)
for row in readerobj:
    print(row[0],“:”,row[1])

fileobj.close()

#Highest production of Mango
fileobj = open(filename)
#2. Highest Mango production
readerobj = csv.reader(fileobj,delimiter=‘,’)
mango_high,year_high = –1,-1

linecount=0
for row in readerobj:
    if linecount==0:
        linecount+=1
    else:
        if int(row[3]) > mango_high:
            mango_high=int(row[3])
            year_high = row[0]
print(“Highest Mango production was”,mango_high,“in the year”,year_high)
fileobj.close()

PostgreSQL Tutorial

# pymysql library connects to MYSQL
# Books
# Publishers

import sqlite3
connection = sqlite3.Connection(‘BOOKSDB.SQLITE’)
cursorobj = connection.cursor()

# SQL – Structured Query Language
# Dropping an already existing table:
#cursorobj.execute(“DROP TABLE Publishers”)

#create a new table:
table1 = ”’
Create Table Publishers(
PUBID INTEGER PRIMARY KEY,
PUBNAME VARCHAR,
PUBCITY VARCHAR
)
”’
#cursorobj.execute(table1)  #creates the table
#create a new table:
table2 = ”’
Create Table BOOKS(
BID INTEGER PRIMARY KEY,
TITLE VARCHAR,
AUTHOR VARCHAR,
PUBID INTEGER,
CONSTRAINT fk_pidid_cons Foreign Key (PUBID) References Publishers(PUBID)
)
”’
#cursorobj.execute(table2)  #creates the table

# INSERT Commands are used to add data to the tables
insert_data = [‘Insert into Publishers (PubID, PubName, PubCity) values (101, “ABC International”,”New York”)’,
               ‘Insert into Publishers values (102,”Indigo Publishers”,”New Delhi”)’,
               ‘Insert into Publishers (PubID, PubCity, PubName) values (105,”Hyderabad”,”Glocal Publishers”)’]

insert_data = [‘Insert into Books values (101,”Python Programming”,”Sachin”,102)’,
                ‘Insert into Books values (102,”Data Science Learning”,”Rohit”,102)’,
                ‘Insert into Books values (103,”SQL Programming”,”Virat”,105)’]
for statement in insert_data:
    cursorobj.execute(statement)
connection.commit()

# pymysql library connects to MYSQL
# Books
# Publishers

import sqlite3
connection = sqlite3.Connection(‘BOOKSDB.SQLITE’)
cursorobj = connection.cursor()

# SQL – Structured Query Language
# Dropping an already existing table:
#cursorobj.execute(“DROP TABLE Publishers”)

#create a new table:
table1 = ”’
Create Table Publishers(
PUBID INTEGER PRIMARY KEY,
PUBNAME VARCHAR,
PUBCITY VARCHAR
)
”’
#cursorobj.execute(table1) #creates the table
#create a new table:
table2 = ”’
Create Table BOOKS(
BID INTEGER PRIMARY KEY,
TITLE VARCHAR,
AUTHOR VARCHAR,
PUBID INTEGER,
CONSTRAINT fk_pidid_cons Foreign Key (PUBID) References Publishers(PUBID)
)
”’
#cursorobj.execute(table2) #creates the table

# INSERT Commands are used to add data to the tables
insert_data = [‘Insert into Publishers (PubID, PubName, PubCity) values (101, “ABC International”,”New York”)’,
‘Insert into Publishers values (102,”Indigo Publishers”,”New Delhi”)’,
‘Insert into Publishers (PubID, PubCity, PubName) values (105,”Hyderabad”,”Glocal Publishers”)’]

insert_data = [‘Insert into Books values (101,”Python Programming”,”Sachin”,102)’,
‘Insert into Books values (102,”Data Science Learning”,”Rohit”,102)’,
‘Insert into Books values (103,”SQL Programming”,”Virat”,105)’]

”’
for statement in insert_data:
 cursorobj.execute(statement)
connection.commit()
”’
# Read data from the database
q1 = “Select * from Publishers”
cursorobj.execute(q1)
results = cursorobj.fetchall()
print(type(results)) #<class ‘list’>
for row in results:
print(row)

q1 = “Select * from Books”
cursorobj.execute(q1)
results = cursorobj.fetchall()
print(type(results)) #<class ‘list’>
for row in results:
print(row)

#UPDATE
q3 =“Update Books Set Author =’Dhoni’ where BID=102 “
cursorobj.execute(q3)
connection.commit()

#DELETE
q3 =“Delete from Publishers where PUBID=101 “
cursorobj.execute(q3)
connection.commit()

q2 = “Select TITLE, PUBNAME, Author from Books t1, Publishers t2 where t1.PUBID=t2.PUBID”
cursorobj.execute(q2)
results = cursorobj.fetchall()
print(type(results)) #<class ‘list’>
for row in results:
#print(row)
 print(f”{row[0]} which is written by {row[2]} is published by {row[1]}“)

”’
Install MYSQL from
https://dev.mysql.com/downloads/mysql/

Installation steps:
https://dev.mysql.com/doc/mysql-installation-excerpt/5.7/en/
or check this:
https://www.sqlshack.com/how-to-install-mysql-database-server-8-0-19-on-windows-10/

Components that we need:
1. Server – dont forget the admin (root) password
2. Client – server host, database, database username and password
3. Database
4. Workbench – UI tool to connect to the Server
”’


import pymysql
connection = pymysql.Connection(host=“localhost”,database=“advaitdb”,user=“root”,password=“learnSQL”)
cursorobj = connection.cursor()

# SQL – Structured Query Language
# Dropping an already existing table:
#cursorobj.execute(“DROP TABLE Publishers”)

#create a new table:
table1 = ”’
Create Table advaitdb.Publishers(
PUBID INT PRIMARY KEY,
PUBNAME VARCHAR(15),
PUBCITY VARCHAR(15)
);
”’
#cursorobj.execute(table1) #creates the table
#create a new table:
table2 = ”’
Create Table advaitdb.BOOKS(
BID INT PRIMARY KEY,
TITLE VARCHAR(15),
AUTHOR VARCHAR(15),
PUBID INT,
CONSTRAINT fk_pidid_cons Foreign Key (PUBID) References Publishers(PUBID)
)
”’
#cursorobj.execute(table2) #creates the table
# Alter is used to change the datatype
# Modify to change the current structure
alter_q =“ALTER TABLE publishers Modify Column PUBNAME varchar(40)”
#cursorobj.execute(alter_q)

alter_q =“ALTER TABLE Books Modify Column TITLE varchar(40)”
cursorobj.execute(alter_q)
# INSERT Commands are used to add data to the tables
insert_data = [‘Insert into Publishers (PubID, PubName, PubCity) values (101, “ABC International”,”New York”)’,
‘Insert into Publishers values (102,”Indigo Publishers”,”New Delhi”)’,
‘Insert into Publishers (PubID, PubCity, PubName) values (105,”Hyderabad”,”Glocal Publishers”)’]
”’
for statement in insert_data:
 cursorobj.execute(statement)
connection.commit()
”’
insert_data = [‘Insert into Books values (101,”Python Programming”,”Sachin”,102)’,
‘Insert into Books values (102,”Data Science Learning”,”Rohit”,102)’,
‘Insert into Books values (103,”SQL Programming”,”Virat”,105)’]


for statement in insert_data:
cursorobj.execute(statement)
connection.commit()

# Read data from the database
q1 = “Select * from Publishers”
cursorobj.execute(q1)
results = cursorobj.fetchall()
print(type(results)) #<class ‘list’>
for row in results:
print(row)

q1 = “Select * from Books”
cursorobj.execute(q1)
results = cursorobj.fetchall()
print(type(results)) #<class ‘list’>
for row in results:
print(row)

#UPDATE
q3 =“Update Books Set Author =’Dhoni’ where BID=102 “
cursorobj.execute(q3)
connection.commit()

#DELETE
q3 =“Delete from Publishers where PUBID=101 “
cursorobj.execute(q3)
connection.commit()

q2 = “Select TITLE, PUBNAME, Author from Books t1, Publishers t2 where t1.PUBID=t2.PUBID”
cursorobj.execute(q2)
results = cursorobj.fetchall()
print(type(results)) #<class ‘list’>
for row in results:
#print(row)
 print(f”{row[0]} which is written by {row[2]} is published by {row[1]}“)

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Machine Learning

Feb 15 2023

Learn R Programming

var1 = 5

var1 = 50

print(var1)

#[1] 50

print(var1 + var4)

var = 55

var4 = 55

#print(var1, var4)

#Error in print.default(var1, var4) : invalid printing digits 55

cat(var1, var4) #50 55

print(‘var1 + var4’)

cat(‘var1 + var4=’,var1 + var4)

var1 + var4= 105

#class

print(class(var2)) #[1] “list”

#class

var2 <- 6

print(class(var2)) #[1] “numeric”

#class

var2 <- 6

print(class(var2)) #[1] “numeric”

var2 <- 6.0

print(class(var2)) #[1] “numeric”

var2 <- 6L #”numeric”

print(class(var2)) #[1] “integer”

var2 <- “6L” #”integer”

print(class(var2)) #[1] “character”

var2 = TRUE

print(class(var2)) ## “logical”

var1 = 10

var2 = 15

print(var1 %% var2) #modulo – remainder

var1 = 100

print(var1 %% var2) #modulo – remainder

var1 = 95

var2 = 15

print(var1 %% var2) #modulo – remainder

var1 = 5

var2 = 15

print(var1 ^ var2) #power:

var1<- 15

var2 <- 20

var3 <- 15

#Relational Operator / comparison operator – output is Logical

print(var1 > var2) #is var1 greater than var2? – FALSE

print(var1 >= var3)

print(var1 <= var3)

print(var1 == var3) # double = is for asking is it equal?

print(var1 != var3)

#Logical operator- input and output both are logical

#I will do work 1 and work 2 today

#actual – I did only work 1 => No

#I will do work 1 or work 2 today

#actual – I did only work 1 => Yes

print(var1 == var3 | var1 != var3) #

print(var1 == var3 & var1 != var3)

#CONDITIONAL STATEMENTS

var1 <- 0

# is it positive or not ?

if (var1 >0) {

print(“Its positive”)

}

if (var1 >0) {

print(“Its positive”)

} else {

print(“Its not positive”)

}

if (var1 >0) {

print(“Its positive”)

} else if (var1<0){

print(“Its negative”)

} else {

print(“Its zero”)

}

#Collections: Vectors, Lists, Matrices, Arrays, Factors & DataFrames

#Vectors: will store multiple values of same datatype

vec1 <- c(45,56,36)

print(vec1)

#List: multiple data types

list1 = list(45,56,”Hello”,c(2,4,6))

print(list1)

#Matrix

mat1 = matrix(c(2,2,4,4,6,6,8,8,10,10,11,11) ,nrow=3,ncol = 4,byrow = FALSE)

print(mat1)

#Arrays – more than 2-D

arr1 = array(c(2,2,4,4,6,6,8,8,10,10,11,11),dim=c(2,4,2,2))

print(arr1)

#factors: categorical values

gender = factor(c(“M”,”M”,”M”,’F’,”F”,”F”))

print(class(gender))

print(nlevels(gender))

#DataFrame

players_stats <- data.frame(

ID= c(10,20,30),

Name=c(“Sachin”,”Virat”,”Dhoni”)

)

print(players_stats)

#membership: %in% : check if left side value is in right side or not

cities<- c(“Delhii”,”New York”,”London”)

print(“Delhi” %in% cities)

avg <- 98

## avg: 80: Grade A, 70-80: B, 60-70- C, 50-60 – D, 40-50: E , <40: Failed

if (avg >=80) {

print(“Grade: A”)

if (avg>=90){

print(“You win special certificate!”)

if (avg>=95) {

print(“You win medal”)

}

} else if (avg>=70) {

print(“Grade: B”)

} else if (avg>=60) {

print(“Grade: C”)

} else if (avg >=50) {

print(“Grade: D”)

} else if (avg>=40) {

print(“Grade: E”)

} else {

print(“Failed”)

}

result = 3

val1 <- switch(result,

“Grade A”,”Grade B”,”Grade C”,”Grade D”,”Grade E”, “Grade F”)

cat(“Result – “,val1)

#Loops – to repeat:

#repeat: keep repeating – break when a condition is met -EXIT Controlled

#while: will check for the condition and then repeat: ENTRY Controlled

#for (exactly how many times to run)

start = 1

repeat{

print(start)

if (start==10){

break

}

start = start+1

}

start = 11

while (start <=20) {

print(start)

start = start + 1

}

#For loop

words <- LETTERS[1:5]

for (i in words) {

print(i)

}

numbers <- seq(1,10,by=3)

for (i in numbers) {

print(i)

}

num = 30

start = 2

isPrime=TRUE

repeat{

if (num%%start==0){

isPrime = FALSE

break

}

if (start==num-1) {

break

}

start=start+1

}

if (isPrime) {

print(“Number is Prime”)

} else {

print(“Number is not Prime”)

}

## Assignment 1: Do the above with WHILE and FOR

## Assignment 2: Extend the same logic (one of the 3) to generate prime numbers

## between 1000 and 1500

for (num in 10:20){

#print(num)

num1=53

Isprime=TRUE

for (a in 3:(num1-1)) {

# cat(“testing value a”,a)

if (num1%%a == 0) {

Isprime=FALSE

#print(a)

#print(“inside Hello”)

break

}

if (Isprime==TRUE){

print(num)

}

########################

#Built-in function

print() #parameter

myfunc.generatePrime <- function(num) {

isPrime=TRUE

for(i in 2:(num-1)) {

if (num %%i==0) {

isPrime=FALSE

}

if (isPrime){

print(‘num is prime’)

} else {

print(‘num is not Prime’)

}

val <- mean(1:100)

print(val)

myfunc.generatePrime(30)

myfunc.checkPrime2 <- function(num) {

isPrime=TRUE

for(i in 2:(num-1)) {

if (num %%i==0) {

isPrime=FALSE

}

return(isPrime)

}

output <- myfunc.checkPrime2(53)

if (output){

print(‘num is prime’)

} else {

print(‘num is not Prime’)

}

for (num in 1000:1300) {

output <- myfunc.checkPrime2(num)

if (output){

print(num)

}

###### ##################### ################

#built in functions

print(seq(10,90))

print(max(10:90))

print(mean(10:90))

#user defined functions

sum.func <- function(num1=1, num2=2,num3=4,num4=6) {

cat(“Number 1 = “,num1)

cat(“\n Number 2 = “,num2,”\n”)

cat(“Number 3 = “,num3)

cat(“\n Number 4 = “,num4,”\n”)

result = num1 * num2

print(result)

}

#calling the functions by parameters

sum.func(40,30)

#call by name

sum.func(num2=40,num4=30)

## Assignments: Logic built using loops- convert them to

## functions

# #####################

a <- “Whats your name”

b <- ‘What\’s your name?’

print(paste(a,b,sep = “:”))

print(substring(a,2,6))

print(tolower(a))

print(toupper(a))

vector1 = c(“Monday”, TRUE,5,”Thursday”)

print(vector1)

print(vector1[2])

print(vector1[-2])

print(vector1[c(2,4)])

list1 = list(“Monday”, TRUE,5,”Thursday”)

print(list1)

VIDEO RECORDING OF THE SESSION

library(ggplot2)

dataset2 <- data.frame(city=c(“City A”,”City B”,”City C”),

revenue=c(200,220,190))

ggplot(dataset2, aes(x=city,y=revenue)) +

geom_bar(stat=”identity”)

##############################

# VECTORS

vec1 <- c(2,4,”HELLO”, 5,6)

print(vec1)

#built-in

vec2 <- 5:50

print(vec2)

vec2 <- 5.4:30.8

print(vec2)

#start, end and increment by

vec3 <- seq(5,30.2,by=0.9)

print(vec3)

vec1 <- c(2,4,”HELLO”, 5,6,9,11)

print(vec1[c(2,3,6)])

vec1 <- c(2,4,6,8,10)

vec2 <- c(1,2,1,2,0)

print(vec1 + vec2)

vec1 <- c(2,4,6,8,10,12)

vec2 <- c(1,2)

print(vec1 + vec2)

vec1 <- c(2,4,16,18,10,12)

vec3 <- sort(vec1)

print(vec3)

vec3 <- sort(vec1, decreasing = TRUE)

print(vec3)

## LIST

list1 <- list(55,”Hello”,c(2,4,6), 5.4)

print(list1)

print(list1[c(1,3)])

list2 <- list(33,99)

mergedlist <- c(list1,list2)

print(mergedlist)

###MATRICES

mat1 <- matrix(c(2,4,6,8,10,12),nrow = 3,byrow=FALSE)

print(mat1)

mat2 <- matrix(c(2,4,6,8,10,12),nrow = 3,byrow=TRUE)

print(mat2)

print(mat1 + mat2)

print(mat1 – mat2)

print(mat1 * mat2)

print(mat1 / mat2)

## ARRAY

arr1 <- array(c(2:20),dim = c(2,2,2))

print(arr1)

print(arr1[1,2,1])

print(arr1[,2,1])

# c(1,2,1)

## Factors

regions<- factor(c(“N”,”S”,”S”,”W”,”N”,”E”,”E”,”E”))

print(is.factor(regions))

dataset1 <- data.frame(

quarter = c(“Q1″,”Q2″,”Q3″,”Q4”),

revenue = c(100,150,200,170),

fruits = c(“Apple”,”Banana”,”Mango”,”Oranges”)

)

print(dataset1)

shorterrow <- dataset1[2:3,]

print(shorterrow)

print(dataset1[,c(2,3)])

CLASS VIDEO 4 - Descriptive Statistics

Class Video 5 - Introduction to Machine Learning - 1

Refer the Machine Learning Introduction Notes here

Class Video 6 - Introduction to Machine Learning - 2

setwd(“D:\\dataset”)

dataset <- read.csv(“1_Data_PreProcessing.csv”)

print(dataset)

dataset$Salesperson = ifelse(is.na(dataset$Salesperson),

ave(dataset$Salesperson,FUN=function(x) mean(x,na.rm=TRUE)),

dataset$Salesperson)

dataset$Quotation = ifelse(is.na(dataset$Quotation),

ave(dataset$Quotation,FUN=function(x) mean(x,na.rm=TRUE)),

dataset$Quotation)

#connecting to SQL Server

#ipaddress, username, password, dbname

#install and run library – RODBC

#sql_connection = odbcConnect(“SQLSERVERODBC”)

#sqlQuery(sql_connection,”Select * from table1″)

#handling the categorical value

dataset$Region = factor(dataset$Region)

#step 3: breaking into training and test set

library(caTools)

split = sample.split(dataset$Win, SplitRatio = 0.8)

training_set = subset(dataset,split==TRUE)

test_set = subset(dataset,split==FALSE)

#Step 4: Feature Scaling

# to bring dataset in similar range

### 1. divide the column with higher value, inthis case quotation by 1000

### 2. Min-Max Scaling – values ranges between 0 to 1

### 3. Z Score normalization – preferred

training_set[,2:3] = scale(training_set[,2:3])

test_set[,2:3] = scale(test_set[,2:3])

test_set

COMPLETE MACHINE LEARNING NOTES HERE

setwd(‘D:\\dataset’)

dataset = read.csv(“2_Marks_Data.csv”)

scatter.smooth(x=dataset$Hours,y=dataset$Marks,main=”Hours Studied v Marks Obtained”)

#split the dataset into training set and test set

library(caTools)

split = sample.split(dataset$Marks, SplitRatio=0.8)

training_set = subset(dataset, split=TRUE)

test_set = subset(dataset, split=FALSE)

#create regression object

regressor=lm(formula = Marks~Hours, data = training_set)

summary(regressor)

# y = 20.76 + 7.57x

# While solving machine learning problem –

## 1. Is my data in a ready state to run the algorithm

## 2. Run the algorithm and check the values

#### 2.1. Is this the best performance of this model (can I improve this model)

#### 2.2: Is this the best model

## 3. Evaluate the performance of the algorithm

## RMSE and Rsquare (o to 1) – closer to 1 means best formance

## training performance v test performance – over fitting and under fitting

Video on Regression with R

setwd(‘D:\\dataset’)

dataset = read.csv(“2_Marks_Data.csv”)

print(dataset)

scatter.smooth(x=dataset$Hours,y=dataset$Marks,main=”Hours Studied v Marks Obtained”)

#split the dataset into training set and test set

library(caTools)

split = sample.split(dataset$Marks, SplitRatio=0.75)

#training_set = subset(dataset, split=TRUE)

training_set = dataset[split,]

print(training_set)

test_set = dataset[!split,]

print(test_set)

#create regression object

regressor=lm(formula = Marks~Hours, data = training_set)

summary(regressor)

# y = 20.76 + 7.57x

# While solving machine learning problem –

## 1. Is my data in a ready state to run the algorithm

## 2. Run the algorithm and check the values

#### 2.1. Is this the best performance of this model (can I improve this model)

#### 2.2: Is this the best model

## 3. Evaluate the performance of the algorithm

## RMSE and Rsquare (o to 1) – closer to 1 means best formance

## training performance v test performance – over fitting and under fitting

y_predict = predict(regressor, newdata = test_set)

#y_predict = predict(regressor, newdata = training_set)

comparison = cbind(test_set, y_predict)

print(comparison)

mse = mean((comparison$Marks – comparison$y_predict)^2)

print(mse)

library(MLmetrics)

mape.value = MAPE(comparison$y_predict, comparison$Marks)

print(mape.value)

y_predict = predict(regressor, newdata = training_set)

#y_predict = predict(regressor, newdata = training_set)

comparison = cbind(test_set, y_predict)

print(comparison)

mse = mean((comparison$Marks – comparison$y_predict)^2)

print(mse)

library(MLmetrics)

mape.value = MAPE(comparison$y_predict, comparison$Marks)

print(mape.value)

Model Evaluation (Post Processing)

admin 0 Comments

Python Programming

Feb 6 2023

Learn Python – Evening Jan 2022 – II

########################
####
str1 = 'HELLO'
str2 = "I am fine"
str3 = '''Where are you going?
How long will you be here?
What are you going to do?'''
str4 = """I am here
I will be here for next 7 days
I am going to just relax and chill"""
print(type(str1),type(str2),type(str3),type(str4))
print(str1)
print(str2)
print(str3)
print(str4)

# What's you name?
str5 = "What's your name?"
print(str5)
#He asked,"Where are you?"
str6 = 'He asked,"Where are you?"'
print(str6)

#He asked,"What's your name?"
#escape sequence  \
print('''He asked,"What's your name?"''')
print("He asked,\"What's your name?\"")

print('nnnnn\nnn\tnn')

print("\FOlder\\newfolder")
# \n is used to print newline in python
print("\\n is used to print newline in python")

# \\n will not print newline in python
print("\\\\n will not print newline in python")

str1 = "Hello You"
str2 = "There"
print(str1 + str2)
print(str1 *5)
for i in str1:
    print("Hello")

#indexing
print(str1[2])
print("last element: ",str1[4])
print("last element: ",str1[-1])
print("second element: ",str1[-8])
print("ell: ",str1[1:4])
print("ell: ",str1[-8:-5])
print("First 3: ",str1[:3])
print("First 3: ",str1[:-6])
print("Last 3: ",str1[6:])
print("Last 3: ",str1[-3:])

#Methods - exactly same as your functions - only difference is they are linked to a class
import time
str1 = "HELLO"
print(str1.replace("L","X",1))

sub_str = "LL"
str2 = "HELLO HOW WELL ARE YOU LL"
cnt = str2.find(sub_str)
print("Count = ",cnt)

if cnt<0:
    print("Sorry, no matching value hence removing")
else:
    print("Value found, now replacing")
    for i in range(5):
        print(". ",end="")
        time.sleep(0.5)
    print("\n")
    print(str2.replace(sub_str,"OOOO"))


out_res = str2.split("LL")
print("Output Result = ",out_res)

out_str = "LL".join(out_res)
print(out_str)

print(str2.title())
print(str2.lower())
print(str2.upper())

str3 = 'hello how well are you ll'
print(str3.islower())
print(str3.isupper())

num1 = input("Enter a number: ")
if num1.isdigit():
    num1 = int(num1)
else:
    print("Invaid input")

ename = input("Enter your first name: ")
if ename.isalpha():
    print("Your name is being saved...")
else:
    print("Invaid name")

#WAP to count of vowels in a sentence
para1 = "Work, family, and endless to-do lists can make it tough to find the time to catch up. But you'll never regret taking a break to chat with your friend, Frost reminds us. Everything else will still be there later."
sum=0
for l in para1:
    if l=='a' or l=='A' or l=='e' or l=='E' or l=='i' or l=='I' or l=='o' or l=='O' or l=='u' or l=='3':
        sum+=1
print("Total vowesl = ",sum)
sum=0
for l in para1.lower():
    if l=='a' or l=='e'  or l=='i' or l=='o' or l=='u':
        sum+=1
print("Total vowesl = ",sum)

sum=0
for l in para1.lower():
    if l in 'aeiou':
        sum+=1
print("Total vowesl = ",sum)

##########  LIST
#LIST
#collection of linear ordered items
list1 = [1,2,3,4,5]
print(type(list1))
print("Size = ",len(list1))

print(list1[0])
print(list1[-1])
print(list1[3])
print(list1[:3])
print(list1[-3:])
print(list1[1:4])

for i in list1:
    print(i)

print([2,3,4]+[6,4,9])
print([2,3,4]*3)

str2 = "A B C D A  B C A B A "
print(str2.count("D"))
print(list1.count(3))

l1 = [2,4,6,8]
print(l1.append(12))
print(l1)
l1[0]=10
print(l1)

l1.insert(2,15)
print(l1)

# Queue: FIFO
# Stack: LIFO

if 16 in l1:
    l1.remove(16) #takes in value to remove
l1.remove(15)
print(l1)
l1.pop(1) #index
print(l1)

#################
while False:
    print("Queue is: ",l1)
    print("1. Add\n2. Remove\n3. Exit")
    ch=input("Enter your choice: ")
    if ch=="1":
        val = input("Enter the value: ")
        l1.append(val)
    elif ch=="2":
        l1.pop(0)
    elif ch=="3":
        break
    else:
        print("Try again!")

while False:
    print("Stack is: ",l1)
    print("1. Add\n2. Remove\n3. Exit")
    ch=input("Enter your choice: ")
    if ch=="1":
        val = input("Enter the value: ")
        l1.append(val)
    elif ch=="2":
        l1.pop(-1)
    elif ch=="3":
        break
    else:
        print("Try again!")

l2 = l1  #they become same
l3 = l1.copy()
print("1. List1 = ",l1)
print("1. List2 = ",l2)
print("1. List3 = ",l3)

l1.append(33)
l2.append(44)
l3.append(55)

print("2. List1 = ",l1)
print("2. List2 = ",l2)
print("2. List3 = ",l3)

l1.extend(l3)
print(l1)
print(l1.count(6))

sum=0
marks=[]
for i in range(3):
    m = int(input("Enter marks in subject "+str(i+1)+": "))
    marks.append(m)
    sum+=m
print("Sum is ",sum, "and average is ",sum/3)
print("Marks obtained is ",marks)

#THREE STUDENTS AND THREE SUBJECTS:
allmarks=[]
for j in range(3):
    sum=0
    marks=[]
    for i in range(3):
        m = int(input("Enter marks in subject "+str(i+1)+": "))
        marks.append(m)
        sum+=m
    print("Sum is ",sum, "and average is ",sum/3)
    print("Marks obtained is ",marks)

    allmarks.append(marks)

print("All the marks are: ",allmarks)

# All the marks are:  [[88, 66, 77], [99, 44, 66], [44, 99, 88]]
# find the highest marks of each subject

#Tuple - linear order immutable collection
#strings are also immutable

tuple1 = (1,3,1,4,1,5,1,6)
print(type(tuple1))
print(len(tuple1))
print(tuple1.count(1))
print(tuple1.index(4))
print(tuple1[2])
for i in tuple1:
    print(i)
t1 = list(tuple1)
t1.append(55)
t1=tuple(t1)
t2 = (2,4,6,8)   #packing
#unpacking
a,b,c,d,e = t2
print(a,b,c,d)
#packing

import numpy as np
x = range(16)
x = np.reshape(x,(8,2))
print(x)
x2 = np.ones((3,3))
print(x2)
x3 = np.full((4,4),11)
print(x3)
x4 = [[1,2,1],[1,1,1],[2,2,2],[3,1,1]]
x4 = np.array(x4)
print(type(x4))
print(x4)

#indexing
print(x4[1:3,1:])
x5 = np.array([[1,2,1],[1,1,1],[2,2,2],[3,1,1]])
print(x4+x5)
print(np.add(x4,x5))
print(x4-x5)
print(np.subtract(x4,x5))
print(x4 * x5)
print(np.multiply(x4,x5))
print(x4 / x5)
print(np.divide(x4,x5))
print(x4 // x5)
print(np.sqrt(x4))
print(np.mean(x4))
print(“Shape of the matrix = “,np.shape(x4))
x6 = [[5],[6],[4]]
print(x4 @ x6) #matrix multiplication
print(np.matmul(x4,x6))



# x=5, y=4
# 3x-2y = 7
# 3x+5y = 35
# A * B = C => B = A inverse * C
A = np.array([[3,-2],[3,5]])
C = np.array([[7],[35]])
#find determinant and if its non zero only then perform inverse
det_A = np.linalg.det(A)
if det_A != 0:
Inv_A = np.linalg.inv(A)
Sol = Inv_A @ C
print(“Solution is: “,Sol)
else:
print(“Solution is not possible”)

# SCIPY
import scipy
#

Numpy Video

#Indigo computers how many laptops and desktops to make
# memory chip: 1L+ 2D <=15000
# processing chip: 1L + 1D <=10000
# machine time: 4L + 3D <=25000
# maximize Profit: 750L + 1000D = ?
import numpy as np
from scipy.optimize import minimize, LinearConstraint, linprog
l,d = 1,1
obj = 750*l + 1000*d
#since we are going to minimize, the obj becomes
obj = –750*l –1000*d
obj_list = [-750, –1000]

lhs_constraint_ineq = [[1,2],
[1,1],
[4,3]]
rhs_value=[15000,
10000,
25000]
val_bounds = [(0, float(“inf”)),(0, float(“inf”))]
opt_sol = linprog(c=obj_list, A_ub=lhs_constraint_ineq, b_ub=rhs_value,method=“revised simplex”)
print(opt_sol)


import pandas as pd
data1 = pd.DataFrame([10,20,30,40,50])
print(data1)

data1 = pd.DataFrame([[10, “Sachin”],[20,“Laxman”],[30,“Dhoni”],[40,“Kohli”],[50,“Rohit”]], columns=
[“Roll No”,“Name”],
index=[“Player 1”,“Player 2”,“Player 3”,“Player 4”,“Player 4”])
print(data1)

dataset1 = pd.read_csv(“D:/datasets/ongc.csv”)
print(dataset1)

VIDEO FOR ABOVE DISCUSSION

import pandas as pd
data = [[“Sachin”,“Cricket”,“Mumbai”,19000],[“Virat”,“Cricket”,“Delhi”,10000],
[“Dhoni”,“Cricket”,“Ranchi”,11000],[“Sunil”,“Cricket”,“Mumbai”,8000],
[“Ravi”,“Cricket”,“Mumbai”, 3000]]
data_df = pd.DataFrame(data, columns=[“Name”,“Sports”,“City”,“Runs”],
index=[“A”,“B”,“C”,“D”,“E”])
print(data_df)
print(pd.__version__) #2.0.0
print(data_df.loc[“B”]) # loc & iloc
print(data_df.loc[[“A”,“C”]])

print(data_df.iloc[0])
print(data_df.iloc[0,2]) #(row,col)
print(data_df.iloc[[0,2],2])
print(data_df.iloc[0:3,1:3])
print(data_df.iloc[3:,:2])

print(“Average of Runs scored: “, data_df[“Runs”].mean())
print(“Total Runs scored: “, data_df[“Runs”].sum())
# Axis = 0 is for Rows, Axis = 1 is for Columns
data_df = data_df.drop([“A”], axis=0)
data_df = data_df.drop([“City”], axis=1)
#
data_df = data_df.drop(data_df.index[1])
data_df = data_df[data_df.Name !=“Virat”]
print(“After Drop”)
print(data_df)

VIDEO - PANDAS INTRODUCTION

import pandas as pd
device_df = pd.read_csv(“D:/datasets/gitdataset/user_device.csv”) # 272 rows x 6 columns
usage_df = pd.read_csv(“D:/datasets/gitdataset/user_usage.csv”) # 240 rows x 4 columns
print(usage_df.head(6))

# merge
usage_device_df = pd.merge(usage_df, device_df,on=“use_id”) # inner
print(“INNER \n“,usage_device_df)
usage_device_df = pd.merge(usage_df, device_df,on=“use_id”, how=“left”) # inner
print(“LEFT \n“,usage_device_df)
usage_device_df = pd.merge(usage_df, device_df,on=“use_id”, how=“right”) # inner
print(“RIGHT \n“,usage_device_df)

usage_device_df = pd.merge(usage_df, device_df,on=“use_id”, how=“outer”) # inner
print(“FULL \n“,usage_device_df)

# 272 & 240 – 159 (159 + 113 + 81 = 353)
print(“Number of Rows in Combind tables: “,usage_device_df.shape[0])
print(“Number of Columns in Combind tables: “,usage_device_df.shape[1])

hotels_df = pd.read_csv(“D:/datasets/gitdataset/hotel_bookings.csv”)
print(hotels_df.shape)
print(hotels_df.dtypes)

”’
Data Analytics steps:
1. Collecting data
2. Data cleaning: missing data, outliers
”’
# heatmap to check missing values
import matplotlib.pyplot as plt
import seaborn as sns

cols_30 = hotels_df.columns[:30]
print(cols_30)
sns.heatmap(hotels_df[cols_30].isnull(), cmap=sns.color_palette([“#00FF00”, “#FF0000”]))
plt.show()

DATA VISUALIZATION PRESENTATION AND PROJECTS

data = [[“January”,1500,1900],[“February”,1900,1800],[“March”,1500,1800],[“April”,1000,1500],[“May”, 2300,2500]]
import pandas as pd
data_df = pd.DataFrame(data, columns=[“Month”,“Runs Scored”,“Runs Given Away”])
print(data_df)
print(data_df[“Runs Scored”].mean())
print(data_df[“Runs Given Away”].sum())
print(data_df[data_df[‘Month’]==“March”])
print(data_df[data_df[‘Month’].isin([“January”,“April”,“May”])])
print(data_df.iloc[0])
print(data_df.loc[[0,2,4],[“Month”,“Runs Given Away”]])

#pd.read_csv(“https://raw.githubusercontent.com/swapnilsaurav/Dataset/master/user_device.csv”)
device_df = pd.read_csv(“D:/datasets/gitdataset/user_device.csv”) #(272, 6)
print(device_df.shape)
usage_df = pd.read_csv(“D:/datasets/gitdataset/user_usage.csv”) #(240, 4)
print(usage_df.shape)
new_df = pd.merge(device_df, usage_df,on=“use_id”) #how=inner
print(new_df)

new_df = pd.merge(device_df, usage_df,on=“use_id”, how=“left”) #how=inner
print(new_df)
new_df = pd.merge(device_df, usage_df,on=“use_id”, how=“right”) #how=inner
print(new_df)
new_df = pd.merge(device_df, usage_df,on=“use_id”, how=“outer”) #how=inner
print(new_df)
# 159+81+113 = 353


link = “https://raw.githubusercontent.com/swapnilsaurav/Dataset/master/baseball_game_logs.csv”

import pandas as pd
data_df = pd.read_csv(link)
print(data_df)

VIDEO RECORDING OF THE SESSION

# Natural language processing
import pandas as pd
link = “https://raw.githubusercontent.com/swapnilsaurav/OnlineRetail/master/order_reviews.csv”
reviews_df = pd.read_csv(link)


”’
1. convert entire text to lower case
2. decomposition on the text (readable text)
3. convert accent (language specific words) into ASCII value (ignore the error)
4. Tokenization: breaking into words
5. Stop words removal (non helpful)
”’
#review_comment_message
import nltk
import unicodedata
reviews_df = reviews_df[reviews_df[‘review_comment_message’].notnull()].copy()
print(reviews_df[‘review_comment_message’].head())

# Function to translate into English
#pip install googletrans==4.0.0-rc1
”’
from googletrans import Translator
translator = Translator()
reviews_df[‘review_comment_english’] = reviews_df[‘review_comment_message’].apply(lambda x: translator.translate(x,src=”pt”, dest=’en’).text)

print(reviews_df[‘review_comment_english’])
”’
# function to normalize portuguese text
def normalize_text(text):
return unicodedata.normalize(‘NFKD’,text).encode(‘ascii’,errors=‘ignore’).decode(‘utf-8’)
def basic_nlp(text):
text = text.lower() # step 1 – lowercase
 # steps 2 and 3
 text = normalize_text(text)
# step 4: tokenize
 words = set(normalize_text(word) for word in nltk.tokenize.word_tokenize(text))
# step 5: remove stop words (non meaningful words)
 STOP_WORDS = nltk.corpus.stopwords.words(‘portuguese’)
words = tuple(w for w in words if w not in STOP_WORDS and w.isalpha())
return words

reviews_df[‘review_comment_words’] = reviews_df[‘review_comment_message’].apply(basic_nlp)
print(“===================”)
print(reviews_df[‘review_comment_words’].head())

# Unigram, bigram, trigram

Probability Distribution Notes

admin 0 Comments

Python Programming

Feb 2 2023

Learning with P

print('hello')

print(5 +3  )
print('5+3=',   5+3)

var1 = 53
print(type(var1))  #<class 'int'>  integer
var1 = '53'  # str - string
print(type(var1))

var1 = 53.0  #float
print(type(var1))

var1 = 53j   #complex
print(type(var1))

var1 = False  #
print(type(var1))

count_of_pens = 23  #variable names can only have alphabets, numbers, _
#variable shouldnt begin with a number
cost_each_pen = 21.23
total_cost = cost_each_pen \
             * count_of_pens
print('Cost of each pen is',cost_each_pen,"so for",count_of_pens,"pens, "
       "total cost would be",total_cost)

#f-string format string
print(f"Cost of each pen is {cost_each_pen} so for {count_of_pens} pens, total cost would be {total_cost:.1f}")

VIDEO 1


###################
player= "Rohit"
country = "India"
position = "Captain"
print(f"The Player {player:<15} plays for the country {country:^15} and is {position:>15} of the team")
player= "Mbangawapo"
country = "Zimbabwe"
position = "Wicketkeeper"
print(f"The Player {player:<15} plays for the country {country:^15} and is {position:>15} of the team")

num1 = 5
num2 = 3
#Arithematic Operations
print(num1 + num2)
print(num1 - num2)
print(num1 * num2)
print(num1 / num2)  #float output
print(num1 // num2) #integer division (double division)- integer (int)
print(num1 % num2)  #remainder - modulo
print(num1 ** num2)  #num1 to the power num2

#post office stamp problem for assignment
length = input("Enter length of the rectangle: ")
length = int(length)
print(type(length))
breadth = int(input("Enter breadth of the rectangle: "))
area = length * breadth
perimeter = 2*(length + breadth)
print(f"The rectangle with length {length} and bread {breadth} has an area of {area} and perimeter of {perimeter}")


#Comparison operators:  <   >    <=   >=  ==   !=
#input here is variables, output is always bool value
val1=34
val2=34
print("Is val1 less than val2? ", val1 < val2)
print("Is val1 greater than val2? ", val1 > val2)
print("Is val1 less than or equal to val2? ", val1 <= val2)
print("Is val1 greater than or equal to val2? ", val1 >= val2)
print("Is val1 equal to val2? ", val1 == val2)
print("Is val1 not equal to val2? ", val1 != val2)

#Logical operators: and or not: Input is bool and output is also bool
print(val1 < val2 and val1 > val2 or val1 <= val2 and val1 >= val2 and val1 == val2 or val1 != val2)
#in AND - even if you have one false - o/p is False otherwise True
# in OR - even if you have one True - o/p is True otherwise False
print(not val1==val2)

#membership operator: in, not in
print( 5 in [5,10,15,20])
print("a" not in "ABCDE")

marks1 = int(input("Enter the marks in subject 1: "))
marks2 = int(input("Enter the marks in subject 2: "))
marks3 = int(input("Enter the marks in subject 3: "))
total = marks1 + marks2 + marks3
avg = total / 3

print(f"Total marks obtained is {total} and the average is {avg:.2f}")

Video 2 click here to access

#Conditional
num1 = -90
if num1 >0:
    print("Number is positive")
    print("This is second line of if")

if num1 >0:
    print("Number is positive")
else:
    print("Number is not positive")

if num1 >0:
    print("Number is positive")
elif num1 <0:
    print("Number is negative")
else:
    print("Its Zero")

avg = 80
'''
avg >= 90: Grade A, 80-90: B, 70-80: C, 60-70: D, 50-60:E, 40-50: F and Grade Failed <40
'''
if avg>=90:
    print("Grade: A")
elif avg>=80:
    print("Grade: B")
elif avg>=70:
    print("Grade: C")
elif avg>=60:
    print("Grade: D")
elif avg>=50:
    print("Grade: E")

elif avg>=40:
    print("Grade: F")

else:
    print("Grade: FAILED")

if avg>=40:
    print("You have passed")

#print - You have passed for all those who got over 40%
avg=99.1
if avg>=40:
    print("You have passed")
    if avg >= 90:
        print("Grade: A")
        if avg >=95:
            print("You win President's medal")
            if avg>=99:
                print("WOW")
    elif avg >= 80:
        print("Grade: B")
    elif avg >= 70:
        print("Grade: C")
    elif avg >= 60:
        print("Grade: D")
    elif avg >= 50:
        print("Grade: E")
    else:
        print("Grade: F")

else:
    print("Grade: FAILED")

#to evaluate an algorithm - we look at Space complexity and Time complexity
# President medal for >95%

num1 = 78
if num1%2==0:
    print("Even")
else:
    print("Odd")

age=21
nationality = "USA"
if age>21 and nationality=="USA":
    print("Vote")

####### LOOPS -  repeatition
# for loop: exactly how manytimes to run the loop
# while loop: condition under which to repeat the loop

# range(a,b,c): a= initial value (including), b=end value (excluding), c= increment
#range(3,12,3): 3,6,9
#range(3,13,3): 3,6,9,12

for i in range(3,16,3):
    print("HELLO")
    print("i = ",i)

Video 3 Here

for i in range(5):
    print("*",end=' ')
print()

'''
* * * * * 
* * * * * 
* * * * * 
* * * * * 
* * * * * 
'''
for j in range(5):
    for i in range(5):
        print("*",end=' ')
    print()

'''
* 
* *  
* * *  
* * * *  
* * * * * 
'''
for j in range(5):
    for i in range(j+1):
        print("*",end=' ')
    print()

'''
* * * * *
* * * *
* * * 
* * 
* 
'''
for j in range(5):
    for i in range(5-j):
        print("*",end=' ')
    print()

'''
    * 
   * *  
  * * *  
 * * * *  
* * * * * 
'''
for j in range(5):
    for i in range(5-j-1):
        print(" ",end='')
    for k in range(j+1):
        print("*",end=' ')
    print()


n=5
m=1
for j in range(1,11):
    for i in range(1,11):
        print(f"{i:>2} * {j:>2} = {j*i:>3}",end="  ")
    print()

#### WHILE Loops: no fixed times - based on some condition
i=1
while i<=10:
    print(i)
    i+=1

#print hello untill user wants
ch='y'
while ch=='y':
    print("HELLO")
    ch=input("Press y to continue, anyother key to stop: ")

DAY 4 Video

import random
num = random.randint(1,100)
print("==> ",num)
l1="="
total_attempts,max,min=0,0,9999
n=250000
pc = n//100
for i in range(n):
    attempt = 0
    while True:
        guess = int(input("Guess the number: "))
        #guess = random.randint(1,100)
        attempt +=1  # attempt = attempt + 1
        if guess ==num:
            print(f"Congratulations! You have guessed it correctly in {attempt} attempts.")
            total_attempts +=attempt
            if min > attempt:
                min = attempt
            if max < attempt:
                max = attempt

            if i%pc==0:
                print(i//pc,"% Completed")

            break
        elif guess > num:
            print("Sorry, Actual number is smaller")
        else:  #guess < num:
            #pass
            print("Sorry, Actual number is greater")

print("Average number of attempts it took: ",total_attempts/n)
print("Maximum attempt:",max," and minimum attempt:",min)

#########################
#########  Attempt  2  ##
import random

#print("==> ",num)
l1="="
total_attempts,max,min=0,0,9999
n=250000
pc = n//100
num = random.randint(1, 100)
for i in range(n):

    attempt = 0
    start, end = 1, 100
    while True:
        #guess = int(input("Guess the number: "))
        guess = random.randint(start,end)
        if guess>100 or guess <1:
            continue  #takes you to the beginning of the loop
        attempt +=1  # attempt = attempt + 1
        if guess ==num:
            #print(f"Congratulations! You have guessed it correctly in {attempt} attempts.")
            total_attempts +=attempt
            if min > attempt:
                min = attempt
            if max < attempt:
                max = attempt

            if i%pc==0:
                print(i//pc,"% Completed")

            break
        elif guess > num:
            #print("Sorry, Actual number is smaller")
            end=guess-1
        else:  #guess < num:
            #pass
            #print("Sorry, Actual number is greater")
            start =guess+1

print("Average number of attempts it took: ",total_attempts/n)
print("Maximum attempt:",max," and minimum attempt:",min)

DAY 5 VIDEO (While Example)

#Strings
str1 = 'Hello'
str2 = "How are you?"
str3 = """I am fine
I am great
I am amazing"""
str4 = '''I am here'''

print(str3)

print("What's your name?")
print('What\'s your name?')
print(str1 + " "+str2)
print(str1 *5)

for i in str1:
    print("Hello")
#subset of the string
str6 = "What's your name?"
print(str6[0])
print(str6[2])
print(len(str6))
print(str6[len(str6) - 1])  #last char
print(str6[len(str6) - 2])  #2nd last char
print(str6[- 1])  #last char
print(str6[- 2])  #2nd last char
print(str6[-len(str6)])

print(str6[:3])
print(str6[-3:])

### Methods
print(str6.index("W"))

Video Day 6

str1 = 'How are YOU I AM fine'
#they are immutable - you cant edit them
#str1[0] = 'h'  #TypeError: 'str' object does not support item assignment
str1 = 'h'+str1[1:]
print(str1)

#functions are independent - print(), len(), input(), int(), str()
#methods - they are functions written within a class
print(str1.isdigit())

val1 = str(5)#input("Enter a number: ")
if val1.isdigit():
    val1  = int(val1)
else:
    print("Invalid number! setting val1 to zero")
    val1 = 0
print(val1)
str2="Hello123"
print(str2.isalnum())
print(str1.upper())  #isupper()
print(str1.lower())
print(str1.title())

print(str1)
print(str1.split("o"))  #default split is done on blank space
l1 = str1.split()
str2 = "|| ||".join(l1)
print(str2)

str3 = "Ioooamooofineooohowoooareoooyouooo?"
str4 = " ".join(str3.split("ooo"))
print(str4)
occ = str3.find("ooo")
print("Occurences = ",occ)
occ = str3.count("ooo")
print("Occurences = ",occ)


start,end=0,len(str3)
for i in range(occ):
    po = str3.index('ooo',start,end)
    print(po,end=" , ")
    start = po+1
print()

# LIST
l1 = []
print(type(l1))
print(len(l1))
l1 = [4,"Hello",8.0,True,[2,4,5],"Fine"]
print(type(l1))
print(len(l1))
print(len(l1[4]))
print(l1[4][1])
#list is mutable (unlike str)
l1[0]= 444
print(l1)

print(l1+l1)
print(l1 *3)
for i in l1[4]:
    print(i)

#list methods

Video for Class 7 here

Library Management Project Description from SwapnilSaurav7

#Tuple - immutable version list

t1 = (2,2,4,6,8,10)  #packing
a,b,c,d,e,f = t1
#print(a,b,c,d,e,f)
print(type(t1))
print(len(t1))
for i in t1:
    print(i," - ",t1)

print(t1[-2:])
#t1[2] = 88
print(t1.index(8))
print(t1.count(2))

t1= list(t1)
t1.append(18)
t1=tuple(t1)

a=(5,88,1,77,99)
b=(5,88,1,77,99)
if a>b:
    print(a)
elif b>a:
    print(b)
else:
    print("both are same")

# List - linear ordered collection
l1=[4,6,8,10,12,8,10,12,8,0,8]
l1.append(55)  #add element at the end
print(l1)
l1.insert(3,90)
l1.insert(3,70)
print("2. ",l1)

#
element = 12
if element in l1:
    l1.remove(12)
else:
    print("Element doesnt exist")

if l1.count(element)<1:
    print("Element doesnt exist")
print()
print("3. ",l1)
l1.pop(3)

print("4. ",l1)
print(l1.index(8))
s,e=0,len(l1)
for i in range(l1.count(8)):
    inx = l1.index(8,s,e)
    print(inx,end=", ")
    s=inx+1
print()
print("5. ",l1)

#copy
l2 = l1  #deep copy - (giving another name)
l3 = l1.copy()  #shallow copy (photocopy)
print("After copy")
print("L1 = ",l1)
print("L2 = ",l2)
print("L3 = ",l3)
l1.append(101)
l2.append(102)
l3.append(103)
print("After editing")
print("L1 = ",l1)
print("L2 = ",l2)
print("L3 = ",l3)

l1.reverse()
print("Reverse: ",l1)

l1.sort()
print("Sort: ",l1)
l1.sort(reverse=True)
print("Sort R: ",l1)

#stack - LIFO: add using append, remove: pop(-1)
#queue - FIFO: append, pop(0)

# 1,5,8,9,7

#add 5 numbers from the user
sum=0
nums=[]
for i in range(5):
    num = int(input("Enter the number: "))
    sum+=num
    nums.append(num)
print("Sum is ",sum)
print("Printing values: ",nums)

VIDEO CLASS 8


#  [[a,b,c],[x,y,z],[p,q,r]]
master_list = []
for i in range(3):
    temp=[]
    for j in range(3):
        m=int(input("Enter the marks: "))
        temp.append(m)
    master_list.append(temp)

print("Master list: \n",master_list)

'''
Assignment: Exten the above program to find highest marks for each subject and for
each students. Eg if the marks are: [[66, 77, 88], [98, 87, 76], [45, 65, 76]]
Highest for subject 1 = 98
                    2 = 87
                    3 = 88
Highest for Student 1 = 88
                    2 = 98
                    3 = 76
'''

# Dictionary - key:value
dict1 = {:,:, :,:}printtype
(dict1[])print
"Hello""Hola"

(dict1)
#deep copy
#shallow copy

(dict1.keys())print
(dict1.items())
i dict1.keys():    (i, dict1[i])
a,b dict1.items():    (a,b)
k dict1.items():    (k)
stats = {:[,,,],:[,,,],:[,,,]}for in 
if "Virat"
print
dict3.pop()
print

VIDEO CLASS 9

#Sets
#data structures - collections: String, List, Tuple, Dictionary
#SETS - A B M O C - there is no order
# doesnt allow duplicate

set1 = {2,4,6,8}
print(set1)
#union intersection minus
set2 = {6,8,10,12}
#union
print(set1.union(set2))
print(set1 | set2)
#intersection
print(set1.intersection(set2))
print(set1 & set2)

#difference
print(set1.difference(set2))
print(set1 - set2)
print(set2.difference(set1))
print(set2 - set1)

#symmetric difference
#union of 2 differences
print(set1.symmetric_difference(set2))
print(set1 ^ set2)
print(set1, set2)

#update doesnt give new set, it changes the main set
set1.update(set2)

#union -> update
# {intersection_update, difference_update, symm_diff_update}
print(set1, set2)

set3 = {2,4,10,12}

# sets to list and to tuple
set1 = tuple(set1)
list(set1)
set()

PYTHON SETS VIDEO

admin 0 Comments

Python Programming

Jan 29 2023

Learning Python with Sahasra – 2023

Follow Python installation steps from here: https://learn.swapnil.pw/python/pythoninstallation/

Python IDEs – https://learn.swapnil.pw/python/pythonides/

print("HELLO")

# 1. INSTALLATION - getting your computer ready
# a. you can practice online at Google Colab (colab.reaserch.google.com)
# b. install all software on your machine -
## i. install Python : python.org and download the version of your choice
## ii. you can program on Python but its very easy to do
## iii. Another software to make it user friendly - IDE
## integrated development environment - you can practice
##  eg Pycharm (jetbrains.com), VS Code , Notebooks like Jupyter, etc

print("Hello how are you?")
print('uyuyuiiugiub7y7 7t6t6vt87tovtotff87yvpyv')
print(5+11)
print('5+11=',5+11)
num1 = 5  #num1 are called variables
num2 = 11 #variable names are case sensitive, name should not start with a digit
    #alphabets, numbers and underscore(_) - only these are allowed
print(num1 + num2)

var1 = 5 #let’s take a variable called var1 and make it equal to 5
# number without decimal point – integer
#var1 is a variable of type integer
print(“var1”)
print(var1)
print(type(var1))

var1 = 5.0 #float – -inf to +inf with decimal point
print(type(var1))

var1 = 5j #complex (imaginary) – i
# square root of -25 = sq rt(25* -1) = 5j
print(type(var1))
print(5j * 5j)

# string – text (str)
var1 = “hello”
print(type(var1))

#5th basic data types – bool (boolean – 2 values: True / False)
var1 = True
print(type(var1))

#Functions for explicit conversion – convert data from given type to this:
# int(), float(), complex(), str(), bool()
var1 = int(“5”)
print(type(var1))

quantity =49
cost_pc = 51.89
total_cost = quantity * cost_pc
print(“Total quantity bought is”,quantity,”each one at a cost of”,cost_pc,”so the total cost is”,total_cost)
print(f”Total quantity bought is {quantity} each one at a cost of {cost_pc:.1f} so the total cost is {total_cost}”)

pl=”Rohit”
cn=”India”
pos=”captain”
print(f”Player {pl:<12} plays for {cn:^12} and is {pos:>20} of the team!”)

pl=”Mabwange”
cn=”Zimbabwe”
pos=”Wicket-keeper”
print(f”Player {pl:<12} plays for {cn:^12} and is {pos:>20} of the team!”)

num1 = int(input(“Enter first number to be added: “)) #default input will read as str
print(type(num1))
num2 = int(input(“Enter second number to be added: “))
print(type(num2))
print(num1+num2)

var1 = 5
var2 = 5.0
var3 = "Hello"
var4 = True
var5 = 5j
#arithmetic operations
var1 = 15
var2 = 4
print(var1 + var2) #8
print(var1 - var2) #
print(var1 * var2)
print(var1 / var2)
print(var1 // var2)  #integer divison, the integer part of the divison
print(var1 % var2) #modulo - remainder
print(var1 ** var2)

# a,b = 30,6      30 % 20

#Comparison operators: is ?? and answer will be bool
var1 = 15
var2 = 4
var3 = 15
print(var1 > var2)
print(var1 >= var3) #is it greater than or equal to
print(var1 < var2)
print(var2 <= var3)
print(var1 == var2)
print(var1 != var2)

#logical operators: input and output both are bool
#and, or, not
print(var1 == var2  and var1 != var2)
print(False and False)  #False
print(False and True)  #False
print(True and False)  #False
print(True and True)  # True

print(False or False)  #False
print(False or True)  #True
print(True or False)  #True
print(True or True)  # True
var1 = 15
var2 = 4
var3 = 15
print(var1 > var2 and var1 >= var3 or var1 < var2 or var2 <= var3 and var1 == var2 and var1 != var2)
#T or F
print("Hello \nHow are you \nI am fine thank you")
# \n is for newline
print("\\n is for newline")
print("\\\\n is for newline")

print("Hello",end=" ")
print("How are you",end=" ")
print("I am fine thank you",end="\n")

#Conditional statements
num1=0
if num1 > 0:
    print("Positive")
    print("This is a positive number")
    print("my 3rd line for positive number")
elif num1 < 0:
    print("Negative")
    print("This is a negative number")
    print("my 3rd line for negative number")
else:
    print("Its neither positive or nagtive")
print("Thank you for using IF")

num1 = int(input("Enter a number to be tested: "))
if num1 %3==0:
    print("Its divisible by 3")
else:
    print("Its not divisible by 3")

avg = 89
if avg>=50:
    print("Result: Pass")
    #85: Grade A, 75> Grade B, >60: C, > 50-D
    if avg>=85:
        print("Grade: A")
        if avg>=90:
            print("Please collect your merit certificate!")
            if avg>=95:
                print("You win President's medal")
    elif avg>=75:
        print("Grade: B")
    elif avg>=60:
        print("Grade: C")
    else:
        print("Grade: D")
else:
    print("Result: Fail")

# a & b=> which is greater
a=45
b=95
if a>b:
    print("A is greater than B")
elif b>a:
    print("B is greater than A")
else:
    print("They are equal")

#Assignment: take three numbers a,b,c and arrange them in increasing order without using any inbuilt function.

[Hint: Build on the last example shared]

#INPUT: a,b,c=20,60,30
#OUPUT: 20,30,60  (increasing order)
a,b,c=80,60,30

# a>b, b>c => clear
# a>b, c>b => wrote additional code to find

#b>a,

a, b, c=50,30,30  #increasing order
if a<b:
    #print (f"{b} {a}")
    if c<b: #b is greatest
        if a<c:
            print(f"{a}, {c}, {b}")
        else:
            print(f"{c}, {a}, {b}")
    else: #c is greatest
        print (f"{a}, {b}, {c}")
else: #b<a
    if c<b: #b is greatest
        print(f"{c}, {b}, {a}")
    else: #b is lowest
        if a<c:
            print (f"{b}, {a}, {c}")
        else:
            print(f"{b}, {c}, {a}")

# 30<50=50

# LOOPS - repeation
#FOR loop - when we know exactly how many times to execute
###  Range(a,b,c): generates values from a (inclusive) to b (exclusive) at steps of c
# range(2,12,3): 2,5,8,11
# range(3,12,3): 3,6,9
# range(6,10): a&b. c is default 1:
#range(5): b & a,c are deafult 0 and 1 respectively => 0,1,2,3,4
for i in range(5):
    print("Hello",i)

for i in range(3,12,3):
    print("Hi there", i)

for i in range(2,12,3):
    print("Hello there", i)

print()
for i in range(5):
    print("*",end=" ")
print()

'''
* * * * * 
* * * * * 
* * * * * 
* * * * * 
* * * * * 
'''
for j in range(5):
    for i in range(5):
        print("*",end=" ")
    print()

#While Loop = based on condition- executes till its True
#print("Hello")

# loops - for & while
## For loop is used when you know exactly how many times to run the loop
for i in range(2,10,2):
    print("* ",i)
print("-------------")
'''
* * * * * 
* * * * * 
* * * * * 
* * * * * 
* * * * * 
'''
for j in range(5):
    for i in range(5):
        print("*",end=" ")
    print()
print("-------------")
for i in range(5):
    print("* "*5)

print("-------------")
'''
*  
* * 
* * * 
* * * * 
* * * * * 
'''
for j in range(5):
    for i in range(j+1):
        print("*",end=" ")
    print()
print("-------------")
'''
* * * * * 
* * * * 
* * * 
* * 
* 
'''
for j in range(5):
    for i in range(5-j):
        print("*",end=" ")
    print()
print("-------------")
'''
* * * * * 
 * * * * 
  * * * 
   * * 
    * 
'''
for j in range(5):
    for x in range(j):
        print(" ",end="")
    for i in range(5-j):
        print("*",end=" ")
    print()

print("--- Assignment ----------")
'''
    *  
   * * 
  * * * 
 * * * * 
* * * * * 
'''

#WHILE
i=0
while i<5:
    print("hello")
    i+=1

print("Thank you")

cont='y'
while cont=='y' or cont=='Y':
    print("Ok, printing some values...")
    cont = input("Do you want to continue? (y for yes)")


cont='y'
while cont=='y' or cont=='Y':
    sum=0
    for i in range(3):
        marks = int(input("Enter the marks: "))
        sum+=marks
    print("Total marks is",sum,"and average is",sum/3)
    cont = input("Do you want to continue? (y for yes)")

import turtle
#screen = turtle.getscreen()
plot = turtle.Turtle()  #creates screen
screen = turtle.Screen()
turtle.Screen().bgcolor("yellow")
plot.forward(100)
turtle.color("red")
plot.right(90)
plot.forward(100)
plot.right(90)
plot.forward(100)
plot.right(90)
plot.forward(100)
##
plot.right(45)
plot.forward(100)
plot.right(45)
plot.forward(100)
plot.right(135)
plot.forward(100)
plot.right(45)
plot.forward(100)
plot.backward(100)
plot.left(45)
plot.backward(100)
plot.left(45)
plot.forward(100)
plot.right(45)
plot.forward(100)

## circle
plot.circle(50)


width = screen.window_width()
height = screen.window_height()

plot.penup()
plot.goto(width/2,height/2)
plot.pendown()
plot.dot(30,"red")


turtle.mainloop()  #keep displaying the screen

# Forward, Backward, Left, Right

#When the value is = to 16 and you want to add 5, you add 5 units to 16
num1 = 18
num2 = 5
num3 = num1 + num2
num4 = num1 * num2
num5 = num1 / num2
num6 = num1 - num2

# 3 square + 4 square + 5 square + 6 square + 7 square
num1 = 3
num2 = 4
num3 = 5
num4 = 6
num5 = 7
result = num1 * num1 + num2*num2 + num3*num3 + num4*num4 + num5*num5
print ("Final result = ",result)

#read 2 values from the user and display val1 square + val2 square
val1 = input("Enter val1: ")
val1 = int(val1)
val2 = int(input("Enter val2: "))
#when you read using input by default values are of type string
print("Type = ", type(val1))
print("Result=", val1*val1+val2*val2)

#solve:  2x.x + 9x - 5 = 0
# 1. Calculate Descriminant: b.b - 4.a.c = 81+40=121
# 2. Root of D = 121 ** 0.5 = +/- 11
# 3. x = (-b +/-D) / 2.a = (a) (-9+11)/4 = 0.5  (b) (-9-11)/4 = -5
print("Solving a quadratic equation for x:")
a=4
b=2
c=-6
D = b**2 - 4*a*c
print("Finding Discriminant = ",D)
if D==0:
    print("This equation has only 1 solution and x = ",(-b/(2*a)))
elif D<0:
    print("This equation has imaginary solution")
else:
    sol1 = (-b+D**0.5)/(2*a)
    sol2 = (-b - D ** 0.5) / (2 * a)
    print(f"Solutions are: {sol1} and {sol2}")


## x.x + 4.5x - 2.5 = 0 / (x+p)(x+q): p.q = -2.5 and p+q = 4.5



#If the number given divides into 2 whole numbers, then it is even. If it is divided by two and it is a decimal or fraction, then it is odd.

#If the number is divided by 5 and the value is a whole number, than it is a multiple of 5

# if <> - elif <> - else
num = -35
if num>0:
    print("Its positive")
    print("Its inside num > 0 condition")
else:
    print("Its not positive")
    print("What else")
print("This is another statement")

# In a block (only IF, IF-ELSE or IF-ELIF-ELSE)
num2 = -10
if num2==0:
    print("Its zero")
elif num2<0:
    print("Its negative")
else:
    print("Its positive")

# WAP to check if a number is odd or even (I will do now)
#Modify the above program to give a message is number is less than 0
# Msg - "Invalid number
num3 = -11
if num3 %2==0:
    print("Its even number")
else:
    print("Its odd number")

num = 112
if num >0:
    if num%2==0:
        print(“Its positive and even”)
        if num%4==0:
            print(“Number is divisible by 4 also”)
    else:
        print(“Its negative and odd”)
elif num<0:
    print(“Its negative”)
else:
    print(“Neither positive nor negative”)

#loops
# for loop
#range(start, stop, increment)
#range(5,25,5) = 5,10,15,20
#counter = 51
#print(counter in range(5,25,5))
for counter in range(5,25,5):
    print(counter)
##range(5,10) = (start=5,end=10, default increment=1) 5,6,7,8,9
#range(5) = (default start=0, end=5, default increment=1) = 0,1,2,3,4
num=10
for j in range(num):
    for i in range(num):
        print(“*”,end=” “)
    print()

for j in range(num):
    for i in range(j+1):
        print(“*”,end=” “)
    print()

for j in range(num):
    for i in range(10-j):
        print(“*”,end=” “)
    print()

num=5
for j in range(1,11):
    for i in range(1,11):
        print(f”{i:<2} * {j:<2} = {j*i:<2}“,end=”  “)
    print()


# while

#WAP to input 5 numbers and find sum

sum=0
for i in range(5):
    num = int(input(“Enter the number: “))
    sum=sum+num
print(“Sum is “,sum)

#WAP to input numbers from the user till they want and find sum
sum=0
ch=‘y’
while ch==‘y’:
    num = int(input(“Enter the number: “))
    sum = sum + num
    ch=input(“Enter y to accept more values, anyother key to stop:”)

print(“Sum is”,sum)

#Another implementation:
#WAP to input numbers from the user till they want and find sum
sum=0
while True:
    num = int(input(“Enter the number: “))
    sum = sum + num
    ch=input(“Enter y to accept more values, anyother key to stop:”)
    if ch!=‘y’:
        break  #command that will throw you out of the loop

print(“Sum is”,sum)

admin 1 Comments

Jan 21 2023

Machine Learning with Python – 01M0

DAY 1 Intro Video

print('5+3=',5+3)  #comment 1
#practice day 1
var1 = 45
print(type(var1))  #<class 'int'> integer
# we have 5 basic types of data (datatypes)

var1=55.0
print(type(var1))  #<class 'float'>

var1 = 3j
print(type(var1))  #<class 'complex'>
print(3j * 3j)  #(-9+0j)

var1="Hello"
print(type(var1))  #<class 'str'>  string

var1=True  #False
print(type(var1))

quantity = 53
price = 119.77
total_cost = quantity * price
#The total cost of 50 pens costing 119 is total_cost
print("The total cost of",quantity,"pens costing",price,"is",total_cost)
#format string - f string
print(f"The total cost of {quantity} pens costing {price} is {total_cost:.2f}")

name1 ="Rohit";country="India"
position="Captain"
print(f"Player named {name1:.<12} plays for {country:X^15} and he is {position:>15} of the team")

name1 ="Mangwabate"
country="Zimbabwe"
position="Wicket-keeper"
print(f"Player named {name1:<12} plays for {country:^15} and he is {position:>15} of the team")

var1,var2 = 50, 60

VIDEO 2 Basic Python Programming

print("I am here");print("Hello \\\n Ok \tfine",end=". ")
print("How are you?"     );

#str, float, int, bool, complex
# \ is called escape character
num1 = 55
name1 = "Sachin"
#whenever you read as input, the data type will always be string
name2 = input("Enter your name: ")
print(name2)
num2 = input("Enter radius: ")
num2 = int(num2)
print(num2)
area = 3.14*num2*num2
print("Area = ",area)

# + / - *
#  // (integer division - this will give you only integer part of the division)
# **  power
# %(modulo -remainder)
num1 = 13
num2 = 5
#Arithematic/math operations
print(num1 + num2)
print(num1 - num2)
print(num1 * num2)
print(num1 / num2) #output wll always be float
print(num1 // num2) #output will always be int
print(num1 ** num2)  # 10 to the power 5
print(num1 % num2)  #modulo -

VIDEO DAY 3 PYTHON

#logical operators: Input is bool values and output is also bool: and or not
#and - even if one value is false it will give you false
#or - even if one value is True it will give you true
#not - opposite: not True = False
print(True and False)
print(False or False)
print(not False)
num1 = 9
num2 = 13
print("Logical operator")
print(num1 > num2 or num1 < num1 and num2 == num1 or num1 != num2 or num1!=num2)
#(T)


#comaprison operators: < > <=  >=  ==  !=  : True/False
num1 = 9
num2 = 13
print("is num1 equal to num2? ",num1==num2)
print("is num1 not equal to num2? ",num1!=num2)
print("is num1 greater than num2? ",num1>num2)
print("is num1 greater than or equal to num2? ",num1>=num2)
print("is num1 less than num2? ",num1<num2)
print("is num1 less than or equal to num2? ",num1<=num2)

r=5
pi=3.14
print("Radius = ",pi*r**2)
# is 71 divisible by 9 ?
print(71%9)

####################
#is x divisible by y or not?
#conditions - they are used to check if its condition 1 or 2
# if to check conditions followed by Conditional or logical- they only
# give you True or False as output
x = 72
y = 9
if x%y==0:
    print(f"{x} is perfectly divisible by {y}")
    print("PERFECT DIVISIBLE")
else:
    print(f"{x} is NOT divisible by {y}")

DAY 4 Video

num1 = 0
if num1 >0:
    print("Its positive")
else:
    print("Its not positive")

num1 = 0
if num1 >0:
    print("Its positive")
elif num1<0:
    print("Its negative")
else:
    print("Its not positive")

sum=448
avg=sum/5
print("AVG = ",sum/5)
#if avg>90 - grade A
# 80-90 - grade B # 70-80 - grade C # 60-70 - grade D
# 50-60 - grade E #40-50" grade F  #<40 - Fail
if avg>=90:
    print("PASS")
    print("Grade = A")
elif avg>=80:
    print("PASS")
    print("Grade = B")
elif avg >=70:
    print("PASS")
    print("Grade = C")
elif avg >= 60:
    print("PASS")
    print("Grade = D")
elif avg >=50:
    print("PASS")
    print("Grade = E")
elif avg>=40:
    print("PASS")
    print("Grade = F")
else:
    print("Grade = Failed")

#Nested conditions
if avg>=40:
    print("PASS")
    if avg >= 90:
        print("Grade = A")
        if avg>=95:
            print("You win President's medal!")
    elif avg >= 80:
        print("Grade = B")
    elif avg >= 70:
        print("Grade = C")
    elif avg >= 60:
        print("Grade = D")
    elif avg >= 50:
        print("Grade = E")
    else:
        print("Grade = F")
else:
    print("Grade = Failed")

num1,num2,num3=10,15,20
if num1>=num2:
    print(f"{num1} >= {num2}")
else:
    print(f"{num2} >= {num1}")

VIDEO DAY 5

#Repeating - loops in programming language
# range(a,b,c): a-start number (including), b-end number (excluding), c-increment
range(3,15,4) # 3, 7, 11,
range(3,7)  # c is default 1: 3,4,5,6
range(4) #a is default 0, c is default 1:  0,1,2,3

# there are 2 ways loops are implemented in Python: FOR  / WHILE
#for - when you know exactly how many times to run
for counter in range(1,11):
    print(counter)
#odd numbers between 1 and 10
for i in range(1,11,2):
    print(i)
# even numbers between 1 and 10
for i in range(2, 11, 2):
    print(i)

for i in range(5):
    print("*")

for i in range(5):
    print("*",end=' ')
print("\n\n")
'''
* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
'''
for j in range(5):
    for i in range(5):
        print("*",end=' ')
    print()
'''
*  
* * 
* * * 
* * * * 
* * * * *
'''
for j in range(5):
    for i in range(j+1):
        print("*",end=' ')
    print()

'''
* * * * *
* * * * 
* * *
* *
*
'''
for j in range(5):
    for i in range(5-j):
        print("*",end=' ')
    print()

'''
    *  
   * * 
  * * * 
 * * * * 
* * * * *
'''
for j in range(5):
    for i in range(5-j-1):
        print(" ",end='')
    for k in range(j + 1):
        print("*", end=' ')
    print()

'''
* * * * *
 * * * * 
  * * *
   * *
    *
'''
'''
1* 1=1   2* 1=2 ... 10*1=10
...
1*10=10  2* 10=20 ...  10*10
'''
for n in range(1,11):
    for m in range(1,11):
        print(f"{m:>2} * {n:>2} = {n*m:>3}",end="  ")
    print()

#while - when you until what condition

DAY 6 Video

num = 51
isPrime = True
for i in range(2, num):
    if num % i == 0:
        isPrime = False
        break
if isPrime:
    print("Its  a prime number ")
else:
    print("Its not a prime number ")

# print prime numbers between 1000 and 5000
start, end = 1000, 5000
for k in range(start, end + 1):
    isPrime = True
    for i in range(2, k):
        if k % i == 0:
            isPrime = False
            break
    if isPrime:
        print(k, end=" , ")

### WHILE LOOP
#print numbers from 1 to 10
i = 1
while i <=10:
    print(i)
    i+=1

choice = True
while choice:
    print("Hello")
    ch = input("Press n to stop")
    if ch=='n':
        choice = False


while True:
    print("Hello")
    ch = input("Press n to stop")
    if ch == 'n':
        break

DAY 7 - While example

#Strings
str1 = 'Hello'
str2 = "Hi there"
str3 = '''Hi there 
how are you
Where are you?'''
str4 = """I am fine
I am here
How are you"""
print(str4)
print(str1 + str2)
print(str1 *3)

for i in str1:
    print(i)

print(str1[2])
#str1[1] = "B"
print(str1[4], str1[-1])
print(str1[0],str1[-5])
print(str1[:3])
print(str1[-3:])

str1= "Hello How ARE YOU"
print(str1.isalnum())
num1 = input("Enter a number: ")
if num1.isdigit():
    int(num1)
    print(num1)
else:
    print("Invalid number")

str2= '     '
print(str2.isspace())
print(str2.islower())
print(str2.isupper())

str3 = "Hello HI There"
print(str3.lower())
print(str3.upper())
print(str3.title())
str4 = str3.replace("h","ABC",1)
print(str4)
str4 = str3.split('e')
print(str4)
str5 = "e".join(str4)
print(str5)
print("HI" in str3)
print(str3.find("HI"))
print(str3.count('e'))

Video 8: String Tutorial

#Sets
#data structures - collections: String, List, Tuple, Dictionary
#SETS - A B M O C - there is no order
# doesnt allow duplicate

set1 = {2,4,6,8}
print(set1)
#union intersection minus
set2 = {6,8,10,12}
#union
print(set1.union(set2))
print(set1 | set2)
#intersection
print(set1.intersection(set2))
print(set1 & set2)

#difference
print(set1.difference(set2))
print(set1 - set2)
print(set2.difference(set1))
print(set2 - set1)

#symmetric difference
#union of 2 differences
print(set1.symmetric_difference(set2))
print(set1 ^ set2)
print(set1, set2)

#update doesnt give new set, it changes the main set
set1.update(set2)

#union -> update
# {intersection_update, difference_update, symm_diff_update}
print(set1, set2)

set3 = {2,4,10,12}

# sets to list and to tuple
set1 = tuple(set1)
list(set1)
set()

SET DISCUSSION VIDEO

#List - linear ordered mutable
list1 = []
print(list1)
print(type(list1))
list1 = [2,4,6.5,"Hello",True,[2,8,12]]
print("Number of elements = ",len(list1))
print(list1[1])
print(type(list1[-2]))
print(type(list1[-1]))

#sum and avg of 5 marks
list_of_marks=[]
sum = 0
for i in range(0):
    m=int(input("Enter marks: "))
    list_of_marks.append(m)
    sum+=m
print("Sum = ",sum)
print("List of marks = ",list_of_marks)

## 2 ways to add values to an existing list: append, insert
list_of_marks.insert(1,100)#index, value
print("List of marks = ",list_of_marks)
list_of_marks.insert(1,80)
print("List of marks = ",list_of_marks)
list_of_marks.insert(1,90)
print("List of marks = ",list_of_marks)
list_of_marks.insert(1,30)
print("List of marks = ",list_of_marks)
list_of_marks.insert(1,40)
print("List of marks = ",list_of_marks)

list_of_marks.sort(reverse=True)
print("(Sort)List of marks = ",list_of_marks)
list_of_marks.reverse()
print("(Reverse)List of marks = ",list_of_marks)

num_to_delete = 80
if num_to_delete in list_of_marks:
    list_of_marks.remove(num_to_delete)
print("(remove)List of marks = ",list_of_marks)
list_of_marks.pop(3)
print("(pop)List of marks = ",list_of_marks)
num_to_delete = 80
if list_of_marks.count(num_to_delete) >0:
    list_of_marks.remove(num_to_delete)
print("(remove)List of marks = ", list_of_marks)
list1 = [10,3,4,5,3,4,6,3,7,8,3,6]
print(list1.count(3))
print(list1.index(3))  #index(element,start,end)

#index of all the values in the list:
element_search = 3
inx_found=0
for i in range(list1.count(element_search)):
    print(list1.index(element_search, inx_found), end=" ,")
    inx_found = list1.index(element_search, inx_found) + 1
print()
list1 = [1,3,5,7]
list2 = list1   #they are same , just have 2 names
list3 = list1.copy() #copy - creates a different copy
print("1. List 1 = ",list1)
print("1. List 2 = ",list2)
print("1. List 3 = ",list3)
list1.append(15)
list2.remove(5)
list3.append(19)

print("2. List 1 = ",list1)
print("2. List 2 = ",list2)
print("2. List 3 = ",list3)

# TUPLE - immutable form of List
t1 = ()
print(type(t1))

t1 = (1,)
print(type(t1))

t1=list(t1)
t1.append(40)
t1 = tuple(t1)
#list, tuple and sets are all 3 inter convertible
#advantage of tuple -its fast to access
t2 = (1,2,3)  #packing
a,b,c = t2  #unpacking
print(a,b,c)

#Dictionary - uses its own key to track values

LIST AND TUPLE DISCUSSION VIDEO

#list, tuple, sets - linear

list1 = [2,3,4,5,2,3,4,2,3,2]
list1=list(set(list1))
print(list1)

#Dictionary: key:value pairs
d1 = {}
print(type(d1))
d1 = {4,5}
print(type(d1))

d1 = {4:"Sachin","Matches":5}
print(type(d1))
print(d1)
print("Keys: ",d1.keys())
print("Values: ",d1.values())
print("(Key, Value): ",d1.items())

print(d1['Matches'])
d2={'City':'Mumbai'}
d1.update(d2)
print(d1)

d2={'City':'Hyderabad'}
d1.update(d2)
print(d1)

#deep v shallow copy
d3 = d1  # deep - creates another name for d1
d4 = d1.copy()
print("D1 = ",d1)
print("D3 = ",d3)
print("D4 = ",d4)
d1.update({'Sports':'Cricket'})
print("D1 = ",d1)
print("D3 = ",d3)
print("D4 = ",d4)
#remove a member: pop(), popitem()
d1.pop(4)  #pop takes key as input
print("D1 after pop: ", d1)
d1.popitem() #last added value is removed - remeber last added is not same as last updated
print("D1 after popitem: ", d1)

print(" iterating through keys: ")
for i in d1.keys():
    print(i)
print("  iterating through values: ")
for i in d1.values():
    print(i)

print(" iterating through items")
for i in d1.items():
    print(i)
for i,j in d1.items():
    print(f"Keys = {i} and value = {j}")

women = {101:"Renuka", 103:"Smriti",105:"Harmanpreet",107:"Deepti"}
men = {102:"Sachin",104:"Virat",106:"Rohit"}
all ={211:'Steve',222:'Warner'}
all.update(women)
all.update(men)
print(all)
for key,val in all.items():
    if key in women.keys():
        print(f"{val} plays in women's team")
    elif key in men.keys():
        print(f"{val} plays in men's team")
    else:
        print(f"{val} neither part of mens or womens team")

Dictionary tutorial video

# SET - sets - linear unordered mutable collection - doesnt allow duplicate
set1 = {'Apple','Grapes','Banana','Orange'}
print(type(set1))
set1.add('Cherry')
set2 = {"Pineapple","Mango","Apple","Orange"}
# two ways to remove
set1.remove("Banana")
set1.discard("Apple")
#set1.remove("Rose") - if value isnt there throws error
set1.discard("Rose")  #doesnt throw error
print("1. Set1: ",set1)
set1.pop()
set1.update(set2)  #union
print("2. Set1: ",set1)
set1.clear()
print("3. Set1: ",set1)
### SET FUNCTIONS  ####
set1 = {'Apple','Grapes','Banana','Orange'}
set2 = {"Pineapple","Mango","Apple","Orange"}
#UNION
print("UNION")
print(set1 | set2)
print(set1.union(set2))
print("INTERSECTION")
print(set1 & set2)
print(set1.intersection(set2))
print("DIFFERENCE")
print(set1 - set2)
print(set1.difference(set2))
print(set2 - set1)
print(set2.difference(set1))

print("SYMMETRIC DIFFERENCE")
print(set1 ^ set2)
print(set2 ^ set1)
print(set1.symmetric_difference(set2))
#update() will update the values of main set
# set1.union(set2) - this gives a new set as output
# set1.update(set2) - set1 is updated with the values
# union - update()
set1.update(set2)
print(set1)
# intersection: intersection_update()
set1.intersection_update(set2)
print(set1)
# difference_update()
set1.difference_update(set2)
print(set1)
#symmetric_difference_update()
set1.symmetric_difference_update(set2)
print(set1)

# set, list, tuple => they are inter-convertible
list1 = [3,6,9,12,3,6,9,3,6,3]
list1 = list(set(list1))
print(list1)
set1 = {'Apple','Grapes','Banana','Orange'}
set1 = list(set1)
set1.index("Grapes")
set1 = set(set1)
set1 = tuple(set1)
set1 = set(set1)
print(set1.issubset(set2))

#
list1 = [3,6,9,12,3,6,9,3,6,3]
list2 = [3,6,9,12,15]
#does all the elements of list2 present in list1?
t_list1 =set(list1)
if set(list1).issuperset(set(list2)):
    print("yes, list2 value exists in list1")
else:
    print("No, list2 has additional elements")

# Basic data types (stores only 1 value) - int, float, str,bool and complex
# Collections (stores multiple values - 1D) - list, tuple,dictionary, set
# functions - own functions - user defined functions
# print(), input(), type(), int(), str(), len() : in-built functions (developers of python have already written for us)
# we will learn to write our own functions

#first part of writting function is to Define the meaning- function
def mytext(val1, val2,val3):#required positional argument
    print("Hello How are you today?")
    print("Where are you going?")
    print("I am fine.",val1)

def mytext2(val1=0, val2=0,val3=9):#default positional argument
    print("Hello How are you today?")
    print("Where are you going?")
    print("I am fine.",val1)
    print("Values are: ",val1,val2,val3)
#demo keyword (non-positional) arguments
def mytext3(val1, val2,val3):#default positional argument
    print("Hello How are you today?")
    print("Where are you going?")
    print("I am fine.",val1)
    print("Values are: ",val1,val2,val3)


#default argument (non-required) & keyword argument (non-positional)
mytext(5,10,0)
print("Done with one time calling now calling second time")
mytext2(20,4,10)
mytext2(20,4)
mytext2(10,5,1)
mytext3(val3=10,val1=9,val2=8)
mytext3(100, val3=9,val2=8)
#print()
# numpy, pandas (Multi-D)

def isPositive(val1):
    #result = "Positive"  # "+ve" / 1
    if val1 >0:
        return 1
    else:
        return 0  #print("Its not Positive")

res = isPositive(100)
if res==1:
    print("Its positive, now lets go ahead building our logic")
else:
    print("STOP! STOP! STOP!")

isPositive(-100)
isPositive(90)

Function Video 1

def myfun1(val1):  #Required positional argument
    print(val1)

myfun1(10)

def myfun2(val1,val2,val3):  #Required positional argument
    print(val1, val2,val3)

myfun2(10,30,20)

# Default argument
def myfun3(val1,val2=100,val3="New York"):  #Required positional argument
    print(val1, val2,val3)
    return val1+val2

myfun3(10,30)

## keywords - (non-positional)
result = myfun3(val2=99,val3=77,val1=44)
print("Result = ",result)

## single function to perform perimeter of triangle, square, pentagon, hexagon

def calcPerimeter(s1=0,s2=0,s3=0,s4=0,s5=0,s6=0):
    if s1==0:
        return "You have not provided any value!"
    elif s2==0:
        return "Perimeter of a line is the same value which is "+str(s1)
    elif s3==0:
        print("We cant have a closed shape with 2 only sides!")
    elif s4==0:
        print("Its a Triangle! Perimeter is",s1+s2+s3)
    elif s5==0:
        if s1==s2 and s2==s3 and s3==s4:
            print("its a square with perimeter",s1*4)
        elif s1==s2 and s4==s3:
            print("Its a rectangle with Perimeter",2*(s1+s3))
        else:
            print("Its an irregular 4 sides shape with perimeter",s1+s2+s3+s4)
    elif s6==0:
        print("Its a pentagon with perimeter",s1+s2+s3+s4+s5)
    else:
        print("Its a hexagon with perimeter",s1+s2+s3+s4+s5+s6)

result = calcPerimeter()
print(result)
result = calcPerimeter(5)
print(result)
calcPerimeter(6,8)
calcPerimeter(8,7,5,4,3,3)

def checkNum(val1):
    if val1 <0:
        return -1  #for negative
    elif val1==0:
        return 0  #zero value
    else:
        return 1  #positive

res = checkNum(100)
if res==-1:
    print("Negative")
elif res==0:
    print("Zero")
else:
    print("Positive")

res = checkNum(-100)
if res==-1:
    print("Negative")
elif res==0:
    print("Zero")
else:
    print("Positive")

Function video 2

list1 = []

class Book:

    num_books = 0 #class level variable

    # object level method
    def say_hi(self,n):
        self.name=n #self. indicates name is specific to object
        print(“Hi…”)
        Book.num_books+=1

# class level variable
# class level method
# object level variable

b1 = Book()
b2 = Book()
b1.say_hi(“Python”)
b2.say_hi(“Django”)
print(b1.num_books)
print(b2.num_books)
print(Book.num_books)
print(“b1.name = “,b1.name)
print(“b2.name = “,b2.name)
#Book.name

Class Tutorial - Video 1

class Library:
def __init__(self, library):
self.library = library
def _method2(self): #declared as protected
 return “I am in Library!!!”
 def __method3(self): #private declaration – cant be accessed outside of this class
 return “I am in Library by method 3!!!”
 def get_libname(self):
return self.library
class Books(Library): #Books is a derived class of Library class (base class)
 title_count = 0
 #__init__ – this is automatically called when object is created
 def __init__(self, title, author,libname=“XYZ Library”):
Library.__init__(self,libname)
self.title = title
self.author = author

Books.title_count+=1

 #get author – object
 def get_author(self):
return self.author
def get_title(self):
return self.title

#count of the book
 @classmethod
 def get_bookcount(cls):
return cls.title_count
class Sample:
def sample_method(self):
Library._method2(self) #protected will not show up but still callable
 #protected concept exists but not strictly implemented

 def sample_method3(self):
Library.__method3(self) #private members are not accessible

b1 = Books(“Python Programming”,“Swapnil”)
b2 = Books(“Data Science Programming”,“Snehil”,“PQR Library”)
b3 = Books(“Blockchain”,“Ojass”)
print(“Number of books in the library = “,b1.get_bookcount())
print(“Number of books in the library = “,b3.get_bookcount())
print(“Title of the book = “,b1.get_title())
print(“Title of the book = “,b2.get_title())
l1 = Library(“ABC Local Library”)
print(“Library name = “,l1.get_libname())
print(“B1 Library is: “,b1.get_libname())
print(“LIBNAME = “,b1.get_libname())
print(“Method2 by Books: “,b1._method2())
s1 = Sample()
print(“Call by Sample: “,s1.sample_method())
#print(“Call by Sample: “,s1.sample_method3()) – throws error
# as private members cant be accessed

#print(“Method2 by Books: “,b1.__method3())- throws error
# as private members cant be accessed

Class Tutorial Video 2

MASTERLIST = [{“ItemCode”: 101,“Item”:“Shirt”,“Price”:28.2},
{“ItemCode”: 102,“Item”:“Bag”,“Price”:18.2},
{“ItemCode”: 103,“Item”:“Book1”,“Price”:38.2},
{“ItemCode”: 104,“Item”:“Watch”,“Price”:58.2},
{“ItemCode”: 105,“Item”:“Shoes”,“Price”:128.2},
{“ItemCode”: 106,“Item”:“Laptop”,“Price”:1028.2}]
class ShoppingCart:
def __init__(self):
self.myshoppingcart = []

#add product to the cart
def add_prod(self):
each_item = {}
item_name = input(“Enter the product Name: “)
not_in_list = True
for items in MASTERLIST:
if item_name==items[“Item”]:
not_in_list = False
if not_in_list:
print(“Sorry, That Item is Out of Stock!”)
else:
item_size = input(“Enter the product Size: “)
item_color = input(“Enter the product Color: “)
item_quantity = int(input(“Enter the product Quantity: “))
each_item ={“Item”:item_name,“Size”:item_size,“Color”:item_color,“Quantity”:item_quantity}
self.myshoppingcart.append(each_item)
#print(self.myshoppingcart)
def display_prod(self):
print(“Item Size Color Quantity”)
for i in self.myshoppingcart:
for k,j in i.items():
print(f”{j:<10}“, end=” “)
print()

def remove_prod(self):
item_name = input(“Enter the product name to remove: “)
not_in_list = True
for items in self.myshoppingcart:
if item_name == items[“Item”]:
self.myshoppingcart.remove(items)
not_in_list = False

if not_in_list:
print(“Sorry, That Item is not in your shopping cart!”)
else:
print(“Item is now removed from your shopping cart!”)

def generate_receipt(self):
print(“Item Size Color Quantity Price”)
print(“=======================================================”)
item_cost = 0
price = 0
grand_total = 0
for i in self.myshoppingcart:
for k,j in i.items():
for master_list in MASTERLIST:
if j==master_list[“Item”]:
price=master_list[“Price”]

print(f”{j:<10}“, end=” “)
if k==“Quantity”:
item_cost = j*price
grand_total+=item_cost
print(f”{round(item_cost):<10}“, end=” “)
print()
print(“——————————————————-“)

print(” TOTAL: $”+str(round(grand_total)))
print(“=======================================================”)

if __name__==“__main__”:
sc1 = ShoppingCart()
sc2 = ShoppingCart()
while True:
print(“1. View my cart \n2. Add to my cart\n3. Remove from my cart\n4. Generate My Receipt\n5. Exit”)
ch=input(“Enter your option: “)
if ch==“1”:
if len(sc1.myshoppingcart)==0:
print(“Your shopping cart is empty!”)
else:
sc1.display_prod()
elif ch==“2”:
sc1.add_prod()
elif ch==“3”:
sc1.remove_prod()
elif ch==“4”:
if len(sc1.myshoppingcart)==0:
print(“Your shopping cart is empty!”)
else:
sc1.generate_receipt()
elif ch==“5”:
break
else:
print(“Invalid option”)

DATABASE TUTORIAL

DAY 1 - Introduction to RDBMS

DAY 2 Video

Click Here to access the database tutorial slides

DESCRIPTIVE STATISTICS

Descriptive Statistics – Types of Data

•Quantitative Data

•Numeric Data

•Continuous
(Weight, Temperature, etc)

•Ratio

•Interval
Data

•Discrete

•

•Qualitative Data

•Categorical

•Nominal
(There is no order in the values): {M, F} {N,S,E,W}

•Ordinal
(There is an order): {1,2,3,4,5} {Good, Average, Bad}

•Text
Data

•Audio

•Video

UNIVARIATE – One Variable

•WEIGHT: FREQUENCY TABLE & HISTOGRAM

•MARKS: FREQUENCY TABLE & HISTOGRAM

•GENDER: BAR GRAPH / PIE CHART

•REGIONS: BAR GRAPH / PIE CHART

•COURSE RATING: BAR GRAPH / PIE CHART/LINE GRAPH (IN A PARTICULAR ORDER)

•TEMPERATURE: FREQUENCY TABLE & HISTOGRAM

•SALES: LINE GRAPH

Day 1 Video

admin 0 Comments

Python Programming

Jan 13 2023

Lecture Notes – I

text1 = 'Hello' \
        'World'
text2 = "hi there"

text3 = '''How are you
where are you
what do you want?'''
text4 = """I am fine"""
#I am just trying to run few programs

print(text1,end=' ')  #printing first text  print("Hello")
print(text2)
print(text3)
print(text4)
'''this is a 
multi line text
please ignore'''

print(type(True))

cost = 60
quantity = 212
total_cost = cost * quantity
print("Cost of each pen is $",cost,"so for ",quantity,"pens, its going to be $",total_cost)
print(f"Cost of each pen is $ {cost} so for  {quantity} pens, its going to be $ {total_cost}")
print("Hellon\nhow are you?\nI am fine")

txt1 = "Hello"
a1 = 5
b1 = False
#user input- will provide the value
inp1 = input("Enter your name:")
print(inp1)
inp2 = int(input("Enter your age:"))
print(type(inp2))
print(inp2)

num1 = 10
num2 = 20
#ArithmeticOperations
print(num1 + num2)
print(num1 - num2)
print(num1 * num2)
print(num1 / num2)
print(num1 // num2)  #integer division - ignores the decimal part
print(num1 ** num2)  #power - exponent
print(num1 % num2)   #mod (modulus) - remainder

#Comparison operators:   <  >   <=   >=   ==  !=
#          :input is anything but output is always bool value

#Logical operations:  and  or not
#          :both input and output are bool value

#comparison operators - output is always Bool
##  >  <  >=  <=  ==  !=
num1 = 56
num2 = 56
num3 = 57
print(num1 <= num2) # less than or equal - T
print(num1 <= num3) # T
print(num1 < num2) # F
print(num1 >= num2)  #T
print(num1 > num2) #F
print(num1 > num3) #F
print(num1 == num2)  #T
print(num1 != num2) #F

#Logical operators
# Today we will do operators and conditions
# I do only operators
#
# Today we will do operators or conditions
# I do only operators

# and or not
num1 = 56
num2 = 56
num3 = 57
print(num1 <= num2 and num1 <= num3 or num1 < num2 and num1 >= num2 or num1 > num2 and num1 > num3 or num1 == num2 and num1 != num2)
#T
#

print()
num1 = int(input("Enter a number: "))
print(type(num1))
#
# 1. Calculate area and perimeter of a rectangle with given sides
# 2. Calculate area and circumference of a circle with radius as input from the user

#conditional statements
num1        = -56
#ask you is it a positive number ?
if num1>0:
    print("hello")
    print("Yes its positive")
elif num1 <0:
    print("Its negative")
else:
    print("Its neither positive nor negative")

avg = 76

'''
avg>85 : Grade A
avg>70: Grade B
:avg >60: Grade C
avg >40: Grade D
<40: Grade E
'''
if avg >=85:
    print("Grade A")
    if avg >= 90:
        print("You win special certificate")
        if avg>95:
            print("You get President's meddal")
elif avg>70:
    print("Grade B")
elif avg>60:
    print("Grade C")
elif avg>40:
    print("Grade D")
else:
    print("Grade E")

#get input of 3 numbers and find the largest and the smallest number
#loops - Keep repeating
# FOR   - when you know how many times
# WHILE - untill the condition is true
#range(a,b,c): start = a, go upto b (excluding), c = increment
#range(3,19,4) = 3, 7, 11,15,
##range(3,9) (increment by default 1) - 3, 4,5,6,7,8
## range(4) (by default start=0, increment = 1)- 0,1,2,3
for i in range(5):
    print("*",end=" ")

print("\n --------------  \n\n")
'''
* * * * * 
* * * * * 
* * * * * 
* * * * * 
* * * * * 
'''
for j in range(5):
    for i in range(5):
        print("*",end=" ")
    print()


print("\n --------------  \n\n")
'''
* * * * * 
* * * * * 
* * * * * 
* * * * * 
* * * * * 
'''
for j in range(5):
    for i in range(5):
        print("*",end=" ")
    print()

print("\n --------------  \n\n")
'''
* 
* * 
* * * 
* * * * 
* * * * * 
'''
for j in range(5):
    for i in range(j+1):
        print("*",end=" ")
    print()

print("\n --------------  \n\n")
'''
* * * * * 
* * * *
* * *
* *
* 
'''
for j in range(5):
    for i in range(5-j):
        print("*",end=" ")
    print()

print("\n --------------  \n\n")
'''
* * * * * 
 * * * *
  * * *
   * *
    * 
'''
for j in range(5):
    for i in range(j):
        print("",end=" ")
    for i in range(5-j):
        print("*",end=" ")
    print()
'''
   *
  *  *
 * ** *
*      *
'''

sum=0
while True:
    num1 = int(input("Enter a number (-999 to stop):"))
    if num1==-999:
        break  #throw us out of the current loop
    sum+=num1


print("Sum of the given numbers are: ",sum)


## check if prime number

while True:
    num1 = int(input("Enter a number (0 to stop/negative numbers not allowed): "))
    if num1 == 0:
        break
    if num1<0:
        print("Invalid number")
        continue
    isPrime = True
    for i in range(2,num1//2+1):
        if num1 % i==0:
            isPrime=False
            break

    if isPrime:
        print(f"{num1} is a Prime number")
    else:
        print(f"{num1} is not a Prime number")

## generate if prime number
num1=0
while True:
    #num1 = int(input("Enter a number (0 to stop/negative numbers not allowed): "))
    num1+=1
    if num1 == 0:
        break
    if num1<0:
        print("Invalid number")
        continue
    isPrime = True
    for i in range(2,num1//2+1):
        if num1 % i==0:
            isPrime=False
            break

    if isPrime:
        print(f"{num1}")
        ch=bool(input())
        if ch!=False:
            break

#read the marks of 5 subjects and print total and average

total = 0

while True:
    for i in range(5):
        marks = int(input("Enter the marks in subject "+str(i+1)+": "))
        total+=marks

    print(f"Total marks is {total} and average is {total/5:.2f}")
    ch=bool(input())
    if ch:
        break

### Enter marks for 5 subjects for as long as user wants to repeat
while True:
    sum = 0
    for i in range(5):
        marks = int(input("Enter your marks in subject "+str(i+1)+": "))
        sum+=marks
    print("Total marks obtained = ",sum)

    ch=bool(input("Enter any key to stop:"))
    #converting empty string to bool will result in
    # False, anything will result in True
    if ch:
        break


########################
####
str1 = 'HELLO'
str2 = "I am fine"
str3 = '''Where are you going?
How long will you be here?
What are you going to do?'''
str4 = """I am here
I will be here for next 7 days
I am going to just relax and chill"""
print(type(str1),type(str2),type(str3),type(str4))
print(str1)
print(str2)
print(str3)
print(str4)

# What's you name?
str5 = "What's your name?"
print(str5)
#He asked,"Where are you?"
str6 = 'He asked,"Where are you?"'
print(str6)

#He asked,"What's your name?"
#escape sequence  \
print('''He asked,"What's your name?"''')
print("He asked,\"What's your name?\"")

print('nnnnn\nnn\tnn')

print("\FOlder\\newfolder")
# \n is used to print newline in python
print("\\n is used to print newline in python")

# \\n will not print newline in python
print("\\\\n will not print newline in python")

str1 = "Hello You"
str2 = "There"
print(str1 + str2)
print(str1 *5)
for i in str1:
    print("Hello")

#indexing
print(str1[2])
print("last element: ",str1[4])
print("last element: ",str1[-1])
print("second element: ",str1[-8])
print("ell: ",str1[1:4])
print("ell: ",str1[-8:-5])
print("First 3: ",str1[:3])
print("First 3: ",str1[:-6])
print("Last 3: ",str1[6:])
print("Last 3: ",str1[-3:])

#Methods - exactly same as your functions - only difference is they are linked to a class
import time
str1 = "HELLO"
print(str1.replace("L","X",1))

sub_str = "LL"
str2 = "HELLO HOW WELL ARE YOU LL"
cnt = str2.find(sub_str)
print("Count = ",cnt)

if cnt<0:
    print("Sorry, no matching value hence removing")
else:
    print("Value found, now replacing")
    for i in range(5):
        print(". ",end="")
        time.sleep(0.5)
    print("\n")
    print(str2.replace(sub_str,"OOOO"))


out_res = str2.split("LL")
print("Output Result = ",out_res)

out_str = "LL".join(out_res)
print(out_str)

print(str2.title())
print(str2.lower())
print(str2.upper())

str3 = 'hello how well are you ll'
print(str3.islower())
print(str3.isupper())

num1 = input("Enter a number: ")
if num1.isdigit():
    num1 = int(num1)
else:
    print("Invaid input")

ename = input("Enter your first name: ")
if ename.isalpha():
    print("Your name is being saved...")
else:
    print("Invaid name")

#WAP to count of vowels in a sentence
para1 = "Work, family, and endless to-do lists can make it tough to find the time to catch up. But you'll never regret taking a break to chat with your friend, Frost reminds us. Everything else will still be there later."
sum=0
for l in para1:
    if l=='a' or l=='A' or l=='e' or l=='E' or l=='i' or l=='I' or l=='o' or l=='O' or l=='u' or l=='3':
        sum+=1
print("Total vowesl = ",sum)
sum=0
for l in para1.lower():
    if l=='a' or l=='e'  or l=='i' or l=='o' or l=='u':
        sum+=1
print("Total vowesl = ",sum)

sum=0
for l in para1.lower():
    if l in 'aeiou':
        sum+=1
print("Total vowesl = ",sum)

##########  LIST
#LIST
#collection of linear ordered items
list1 = [1,2,3,4,5]
print(type(list1))
print("Size = ",len(list1))

print(list1[0])
print(list1[-1])
print(list1[3])
print(list1[:3])
print(list1[-3:])
print(list1[1:4])

for i in list1:
    print(i)

print([2,3,4]+[6,4,9])
print([2,3,4]*3)

str2 = "A B C D A  B C A B A "
print(str2.count("D"))
print(list1.count(3))

l1 = [2,4,6,8]
print(l1.append(12))
print(l1)
l1[0]=10
print(l1)

l1.insert(2,15)
print(l1)

# Queue: FIFO
# Stack: LIFO

if 16 in l1:
    l1.remove(16) #takes in value to remove
l1.remove(15)
print(l1)
l1.pop(1) #index
print(l1)

#################
while False:
    print("Queue is: ",l1)
    print("1. Add\n2. Remove\n3. Exit")
    ch=input("Enter your choice: ")
    if ch=="1":
        val = input("Enter the value: ")
        l1.append(val)
    elif ch=="2":
        l1.pop(0)
    elif ch=="3":
        break
    else:
        print("Try again!")

while False:
    print("Stack is: ",l1)
    print("1. Add\n2. Remove\n3. Exit")
    ch=input("Enter your choice: ")
    if ch=="1":
        val = input("Enter the value: ")
        l1.append(val)
    elif ch=="2":
        l1.pop(-1)
    elif ch=="3":
        break
    else:
        print("Try again!")

l2 = l1  #they become same
l3 = l1.copy()
print("1. List1 = ",l1)
print("1. List2 = ",l2)
print("1. List3 = ",l3)

l1.append(33)
l2.append(44)
l3.append(55)

print("2. List1 = ",l1)
print("2. List2 = ",l2)
print("2. List3 = ",l3)

l1.extend(l3)
print(l1)
print(l1.count(6))

sum=0
marks=[]
for i in range(3):
    m = int(input("Enter marks in subject "+str(i+1)+": "))
    marks.append(m)
    sum+=m
print("Sum is ",sum, "and average is ",sum/3)
print("Marks obtained is ",marks)

#THREE STUDENTS AND THREE SUBJECTS:
allmarks=[]
for j in range(3):
    sum=0
    marks=[]
    for i in range(3):
        m = int(input("Enter marks in subject "+str(i+1)+": "))
        marks.append(m)
        sum+=m
    print("Sum is ",sum, "and average is ",sum/3)
    print("Marks obtained is ",marks)

    allmarks.append(marks)

print("All the marks are: ",allmarks)

# All the marks are:  [[88, 66, 77], [99, 44, 66], [44, 99, 88]]
# find the highest marks of each subject

#
num = 51
isPrime = True
for i in range(2,num):
    if num%i==0:
        isPrime = False
        break
if isPrime:
    print("Its a Prime number")
else:
    print("Its not a prime number")

###
start1,end1= 500,5000
for j in range(start1,end1+1):
    isPrime = True
    for i in range(2, j):
        if j % i == 0:
            isPrime = False
            break
    if isPrime:
        print(j,end=", ")

# while loop
#While loop
i=1
while i<=10:
    print(i)
    i+=1

ch=True
while ch:
    num=int(input("Enter a number: "))
    if num%2==0:
        print("Its an even number!")
    else:
        print("Its an odd number")
    choice=input("Do you want to continue (press n to stop):")
    if choice=='n':
        ch=False


while True:
    num=int(input("Enter a number: "))
    if num%2==0:
        print("Its an even number!")
    else:
        print("Its an odd number")
    choice=input("Do you want to continue (press n to stop):")
    if choice=='n':
        break


import random

n=1
total_attempts = 0
max=0
min=99999999
for i in range(n):
    comp_num = random.randint(1,100)
    print("Random: ",comp_num)
    attempt = 0
    while True:
        guess = int(input("Guess the number: "))
        #guess = random.randint(1, 100)
        attempt+=1
        if guess == comp_num:
            print("Congratulations! You have guessed it correctly. Attempts = ",attempt)
            total_attempts+=attempt
            if attempt>max:
                max=attempt
            if attempt <min:
                min=attempt
            break
        elif comp_num > guess:
            print("Sorry! You have guessed low!")
        else:
            print("Sorry! You have guessed high")

print("Avg attempts = ",total_attempts/n)
print("Max attempts =",max,"and Minimum attempts = ",min)



'''
Avg attempts =  99.384
Max attempts = 529 and Minimum attempts =  1
'''

#######
import random

n=500
total_attempts = 0
max=0
min=99999999
for i in range(n):
    comp_num = random.randint(1,100)
    print("Random: ",comp_num)
    attempt = 0
    low,high=1,100
    while True:
        #guess = int(input("Guess the number: "))
        guess = random.randint(low, high)
        attempt+=1
        if guess == comp_num:
            print("Congratulations! You have guessed it correctly. Attempts = ",attempt)
            total_attempts+=attempt
            if attempt>max:
                max=attempt
            if attempt <min:
                min=attempt
            break
        elif comp_num > guess:
            print("Sorry! You have guessed low!")
            low= guess+1
        else:
            print("Sorry! You have guessed high")
            high=guess-1

print("Avg attempts = ",total_attempts/n)
print("Max attempts =",max,"and Minimum attempts = ",min)

'''
Avg attempts =  7.522
Max attempts = 15 and Minimum attempts =  1
'''

txt1 = "HELLO"
txt2 = 'How are yOU?'
# what's your name?
print("what's your name?")
print('He asked,"Where are you?"')

#He asked,"What's your name?"
print('''He asked,"What's your name?"''')
print("He asked,\"What's your name?\"")

txt3 = '''How are you?
Where are you?
what do you want?'''
txt4 = """I am fine
I am here
I want nothing"""
print(txt4)

for ch in txt1:
    print(ch)
print(txt1+" "+txt2)
print(txt1*10)

#indexing
print(txt1[0])
print(txt1[4])
length = len(txt1)
print("Total characters = ", length)
print(txt1[length-1])
print(txt1[-1])
print(txt1[length-2])
print(txt1[length-3])
print(txt1[-3])
print(txt1[0]+txt1[1]+txt1[2])
print(txt1[0:3])
print(txt1[0:4])
print(txt1[1:4])
print(txt1[2:5])
print(txt1[-3:])
print(txt1[:])

#METHODS ARE INBULT FUNCTIONS OF A CLASS
print(txt1.lower())
print(txt2.upper())

#String - class
# functions specific to classes are called methods

str1 = "O I see I am fine see you are NICE"
str2 = "hello hi"
print(str1.islower())
print(str2.islower())
str3 = str2.upper()
print(str3)
print(str3.isupper())

num1 = input("Enter a number: ")
if num1.isdigit():
    num1=int(num1)
else:
    print("Invalid number as input, setting it it zero")
    num1 = 0
print("Num1 = ",num1)

#create username with only alphabets and numbers
username = input("Enter your username: ")
if username.isalnum():
    print("Username accepted")
else:
    print("Invalid Username!")

print(str1.upper())
print(str1.lower())
print(str1.title())

str1 = "O I see I am fine I see I you are NICE"
print("i" in str1)
print(str1.find('I'))
print(str1.count('I'))
print(str1.find('I',3))
print(str1.find('I',9))

char = "ee"
num_pos = str1.count(char)
print("Total times char is present = ",num_pos)
print("Their positions are: ",end="  ")
start_pos = 0
for i in range(num_pos):
    nxt_val = str1.find(char,start_pos)
    print(nxt_val,end= " , ")
    start_pos = nxt_val+1

print(str1.replace("ee","EE"))

words = str1.split("I")
print(words)
str6 = "I".join(words)
print(str6)

#LIST
l1 = [5,4,"Hello",99,False,100,[20,10, 5]]
print(type(l1))
print(len(l1))
l2 =l1[-1]
print(l2[1])
print(l1[-1][2])
print(l1[1:4]) #4, "hello" 99
print("Only Integer values fom List")
for i in l1:
    if str(i).isdigit():
        print(i)

print(l1+l2)
print(l2*5)

list1 = [2,4,6,8,10]
list1.insert(2,33)
list1.remove(10)  # remove asks
print(list1)
# let's simulate Queue behavior: FIFO
list2 = []
while True:
    print("1. Add Value to the Stack")
    print("2. Remove Value from the Stack")
    print("3. Exit from the Stack")
    ch=input("Enter the operation you want to perform: ")
    if ch=="1":
        value = input("Enter the member to be added: ")
        list2.append(value)
        print("Printing the stack:",list2)
    elif ch=="2":
        list2.pop(0)  # position is entered
        print("Printing the stack:", list2)
    elif ch=="3":
        print("Removing all the values from the queue and terminating it!")
        list2.clear()
        break
    else:
        print("Invalid options")

#STACK - FILO
list2 = []
while True:
    print("1. Add Value to the Queue")
    print("2. Remove Value from the Queue")
    print("3. Exit from the queue")
    ch=input("Enter the operation you want to perform: ")
    if ch=="1":
        value = input("Enter the member to be added: ")
        list2.append(value)
        print("Printing the queue:",list2)
    elif ch=="2":
        list2.pop(0)
        print("Printing the queue:", list2)
    elif ch=="3":
        print("Removing all the values from the queue and terminating it!")
        list2.clear()
        break
    else:
        print("Invalid options")

#WAP to input marks in 3 subjects for 3 students
# [[1,2,3], [10, 20,30], [5,0,15]]
num_students = 3
num_subjects = 3

all_data=[]
for i in range(num_students):
    t_list = []
    for j in range(num_subjects):
        val = input("Enter the marks in subject "+str(j+1)+" and student "+str(i+1)+": ")
        t_list.append(val)
    all_data.append(t_list)
print("Display all data: ",all_data)

l1 = [1,3,6,5,7,7,7]
#List is mutable
l1[2]=50
print(l1)
count = l1.count(7)
print("Count = ", count)
print("Index = ", l1.index(7))

#deep copy v shallow copy
print("1. Before")
print(l1)
l2 = l1   # deep copy
l3 = l1.copy()#shallow copy
print("1. AFTER")
print("Values in Chapter 1 and Room 1:", l1)
print("Values in Chapter 1 and Room 1:", l2)
print("Values in Chapter 1 and Room 1:", l3)
l1.append(50)
l3.insert(100,200)
l2. insert(45,20)
print("2. AFTER")
print("Values in Chapter 1 and Room 1:", l1)
print("Values in Chapter 1 and Room 1:", l2)
print("Values in Chapter 1 and Room 1:", l3)

l1 = [10,40,60,20,40,80]
l1.sort()
print("Sort: ",l1)
l1.reverse()
print("Reverse: ",l1)
l3=[3]
l3.extend(l1) # l3 = l3 + l1
print(l3)

#l3 = l1 +l2

#Assignment: Read marks in 3 subjects for 3 students and find the highest marks in each subject

START PLANNING ON BELOW PROJECT WORK

Library Management Project Description from SwapnilSaurav7

Ignore the libraries to be used instructions above, instead, use Connecting to Database and save and retrive data from the database. You can use SQLITE3 or MYSQL or any database of your choice. You need to implement all the features mentioned.

#TUPLE - immutabe form of List
t1 = (2,4,6,8,10,12,14,16,18,20)  #packing
print(type(t1))
print(t1[4])

t2=()
print(type(t2))

t3=(3,)
print(type(t3))

for i in t1:
    print(i, end="  , ")
print()
t1 = list(t1)
print(type(t1))
t1.append(99)
t1=tuple(t1)
t2 = (3,6,9,12)
a,b,c,s = t2
print(a)

t4=(5,99)
t5=(5,99)
if t4>t5:
    print(t4, "greater")
elif t5>t4:
    print(t5, "greater")
else:
    print("Both are same")

##Dictionary: there is no defaut order
# each member has its own key
dict1 ={"Name": "Rohit","Sport":"Cricket",1:"Captain",1:100}
print(type(dict1))
print(dict1['Name'])
print(dict1[1])

#Immutable: String, Tuple
#Mutable:  List, Dictuinary, Sets
t_dict = {'City':'Mumbai'}
dict1.update(t_dict)
print(dict1)

dict2 = dict1
dict3 = dict1.copy()

print("1. Dictionaries")
print(dict1)
print(dict2)
print(dict3)

dict1.pop(1)
dict3.popitem()
print("2. Dictionaries")
print(dict1)
print(dict2)
print(dict3)

print("Items (Key,value): ",dict1.items())
print("Values: ",dict1.values())
print("Keys: ",dict1.keys())
dict1.clear()
print(dict1)

marks_dict={}
for i in range(2):
    name1 = input("Enter the students name: ")
    t_list = []
    for j in range(3):
        m=int(input("Enter marks: "))
        t_list.append(m)
    marks_dict.update({name1:t_list})

print("Marks details: ")
for i,j in marks_dict.items():
    print(f"{i} obtained marks: {j}")
    

list_temp= ['Maths','Science','Social Studies']
all_marks = {}
student1 = {}.fromkeys(list_temp,-9)
all_marks.update(student1)

print("All marks: \n",all_marks)
for i in all_marks.keys():
    marks = int(input("Enter the marks for "+i+" : "))
    all_marks[i]=marks

print("All marks are: ",all_marks)

#Basic data types
val1 = 5  #int
print(type(val1))

val1 = '5'  #str
print(type(val1))

val1 = 5.0  #float
print(type(val1))

val1 = True  #bool - True / False
print(type(val1))

val1 = 5j  #complex - j (square root of -1)
print(type(val1))

val1 = 4

## comparison operators - takes num as input but gives bool as output
## logical operators: take bool value as input and gives bool as output
# AND: All the values have to be True to be True else its False
# True and True = True
# T and T and T and T and T and T and F = False

# OR: All the values have to be False to be False otherwise its True
##  True or False = True

## control structure with logical operators, you mean multiple conditions
val1 = 185

if val1>0 and val1 <100:
    print("Value is between 0 and 100")

## Basic graphics, sets, functions,
list1 = [5, 5,5,8.3, False,"Hello",[1,6,9]]
tup1 = (5, 8.3, False,"Hello",[1,6,9])  #list and tuple have auto index: 0...
dict1 = {5:"Hello","Name":"Sachin"}

# SET -
set1 = {"Apple","Banana"}
print(type(set1))
print(set1)
# sets - union, intersection, difference, symmetric difference
set1 = {2,4,6,8}
set2 = {1,3,5,7,6,8}
# union - it puts all the values together
set3 = set1.union(set2)
print("Set 3 = ", set3)

#SETS
set1 = {1,2,3,10,20}
set2 = {1,2,3, 50,60}
print("UNION: ")#union
set3 = set1.union(set2)
print(set3)
print(set1 | set2)

print("INTERSECTION: ")#
set3 = set1.intersection(set2)
print(set3)
print(set1 & set2)

print("DIFFERENCE: Set1 - Set2")#
set3 = set1.difference(set2)
print(set3)
print(set1 - set2)

print("DIFFERENCE: Set2 - Set1")#
set3 = set2.difference(set1)
print(set3)
print(set2 - set1)

print("SYMMETRIC DIFFERENCE")#
set3 = set2.symmetric_difference(set1)
print(set3)
print(set2 ^ set1)


#### update, difference_update, intersection_update, symmetric_difference_update)
#without update, the operations result in new sets but with update, existing set is updated

### Functions - giving a name to a block of code
def mystatements():  # user defined functions
    print("Whats your name?")
    print("Where are you going?")
    print("How are things?")

mystatements()
mystatements()
mystatements()

#below is an example of udf which doesnt take any argument nor does it return any value
def add_2_num():
    num1 = input("Enter a number: ")
    num2 = input("Enter another number: ")
    sum = num1 + num2
    print("total value is",sum)

#add_2_num()
#this is an example of function returning a value (still no arguments)
def add_2_num_ret():
    num1 = input("Enter a number: ")
    num2 = input("Enter another number: ")
    sum = num1 + num2
    #print("total value is",sum)
    return sum
#result = add_2_num_ret()
#print("After return value is", result)


#example of function that takes argument
#TYPE 1 Required positional arguments
def add_2_num_arg(num1, num2):
    sum = num1 + num2
    #print("total value is",sum)
    return sum

#TYPE 2: Default (opp of Required) positional arguments
def add_2_num_arg1(num1, num2="19"): #num2 is default
    sum = num1 + num2
    #print("total value is",sum)
    return sum

#values are mapped from left to right
output = add_2_num_arg1("15","89")
print("Result from  add_2_num_arg1: ",output)

output = add_2_num_arg1("15")
print("Result from  add_2_num_arg1: ",output)

# TYPE 3: Keyword arguments (non-Positional)
output = add_2_num_arg1(num2 = "15",num1 = "89")
print("Result from  add_2_num_arg1: ",output)


# TYPE 4: Variable length arguments
def myfun1(*var1, **var2):
    print("Var 1 = ",var1)    #Tuple
    print("Var 2 = ", var2)   #Dictionary

myfun1(2,4,99,"hello",False,[2,3,4],num2 = "15",num1 = "89")

#WAP to count positive numbers entered by a user
def checkPositive(*num): #variable length arguments
    total=0
    for i in num:
        if i >0:
            total+=1
    return total

def checkPositive2(num): #variable length arguments
        if num >0:
            print("Positive")
        else:
            print("Not Positive")

def checkPositive3(num):  # variable length arguments
    if num > 0:
        return 1
    else:
        return 0

val1 = [13,35,90,-9,0,8]
tot = checkPositive(13,35,90,-9,0,8,-8,-6,6)
print("Number of positive values = ",tot)

val2 = -9
result = checkPositive3(val2)
if result==1:
    print("Number is positive")
else:
    print("Number is not positive")


total = 0
val1 = [13,35,90,-9,0,8]
for i in val1:
    total += checkPositive3(i)
print("Total positive values = ",total)

#######################

def myfactorial(n):
    if n<=1:
        return 1
    else:
        return n * myfactorial(n-1)

result = myfactorial(-5)
print("Factorial is ",result)
# return 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1
# 2 = 2 * 1!
# 1 * 0!

Refer Below Youtube channel for details

https://www.youtube.com/watch?v=42LzqpaVbw8&list=PLoGgviqq4844vbwcKegJgIxSQyVHDzSXT

val = 5
aList = [2,4,5,3,5,6,7,5]
count = 0
for item in aList:

    if item==val:
        count=count+1

print("Count = ",count)


'''
import random
a = random.random()  # random value between 0 and 1
print(a)
b = random.randint(1,3)
print(b)

a <- 5 #assignment in APSC exam language, in Python: a =5
a = 5 # is a equal to 5? in Python a ==5

aList <- [2,4,6,8]
DISPLAY aList[1]

a <- aList[3]

aList[2] <- 10  # [2,10,6,8]
INSERT(aList, 2,10)  # [2,10,4,6,8]
APPEND(aList,20)   # [2,10,4,6,8,20]
REMOVE(aList,4)  # [2,10,4,8,20]
LENGTH(aList)  #len(aList) - python

# In Python we say:
for item in alist:
    pass

#in APSC lang
FOR EACH item in aLists
{

}


def fun1(n1,n2):

    return 1

PROCEDURE fun1(n1,n2)
{

    RETURN (1)
}
'''

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SQL Programming - Sessions

DATABASE TUTORIAL

DESCRIPTIVE STATISTICS

•WEIGHT: FREQUENCY TABLE & HISTOGRAM

•MARKS: FREQUENCY TABLE & HISTOGRAM

•GENDER: BAR GRAPH / PIE CHART

•REGIONS: BAR GRAPH / PIE CHART

•COURSE RATING: BAR GRAPH / PIE CHART/LINE GRAPH (IN A PARTICULAR ORDER)

•TEMPERATURE: FREQUENCY TABLE & HISTOGRAM

•SALES: LINE GRAPH

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