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