print("Hello World")

string1 = 'Good morning'

print(string1[:3])

print(string1[4:])

message='A kong string with a silly typo'

new_message=message[:2]+'l'+message[3:]

print(new_message)

pets="Dogs & Cats"

print(pets.index('&'))

email="[email protected]"

old_domain = "gmail.com"

new_domain = "yahoo.com"

def replace(email,old_domain,new_domain):

with_symbol="@"+old_domain

for with_symbol in email:

index=email.index('@')

new_email=email[:index]+new_domain

return new_email

print(replace(email,old_domain,new_domain))

string2=" ".join(["This","is","joined"])

print(string2)

print("...".join(["This","is","a","string","joined","by","three","dots"]))

string3="This is the string splitted based on the split method"

print(string3.split())

print(string3.count('s'))

print(string3.endswith('method'))

name="Manny"

lucky_number=len(name)*3

print("Your name is {} and your lucky number is {}".format(name,lucky_number))

print("Your name is {name} and your lucky number is {number}".format(name=name,number=lucky_number))

print("Your name is {0} and your lucky number {1}".format(name,lucky_number))

price =7.5

with_tax = price*3.33

print(price,with_tax)

print("base price {:.2f} and tax is {:>50.2f}".format(price,with_tax))

list1=['Now','we','are','cooking']

print(type(list1))

print(len(list1))

print(list1)

print(list1[0])

print(list1[1])

fruits=["Pineapple","Apples","Grapes","Oranges"]

fruits.append("Jack Fruit")

fruits.insert(0,"Kiwi")

fruits.insert(len(fruits)+10,"peach")

print(fruits)

fruits.remove("Grapes")

print(fruits)

print(fruits.pop(2))

print(fruits)

fruits[2]='Strawberry'

print(fruits)

animals=['lion','monkey','zebra','dolphin']

len_chars=0

for animal in animals:

len_chars+=len(animal)

print("Total length:{} and average:{}".format(len_chars,len_chars/len(animals)))

names=['laxman','rama','hanuman','sita']

for index,person in enumerate(names):

print('{}-{}'.format(index+1,person))

email_list=[('laxman','[email protected]'),('rama','[email protected]')]

def re_order(people):

for name,email in people:

print("{}<{}>".format(name,email))

re_order(email_list)

multiples=[]

for x in range(71):

if x%7 == 0:

multiples.append(x)

print(multiples)

multiples=[]

for x in range(1,11):

multiples.append(x*7)

print(multiples)

multiples=[x*7 for x in range(1,11)]

print(multiples)

programs=["Python","Java","C","C++","COBOL","VB"]

length_program=[len(x) for x in programs]

print(length_program)

multiples_of_three=[x for x in range(0,101) if x%3 == 0]

print(multiples_of_three)

file_count={"jpeg":20,"csv":24,"exe":33,"txt":52,"py":100}

print(file_count)

print(file_count["jpeg"])

print("jpeg" in file_count)

file_count["cfg"] =12

print(file_count)

file_count["csv"]=17

print(file_count)

del file_count["csv"]

print(file_count)

for key in file_count:

print(key)

for key,value in file_count.items():

print("There are {} and {} ".format(value,key))

for key in file_count.keys():

print(key)

for value in file_count.values():

print(value)

def count_letters(text):

result = {}

for letter in text:

if letter not in result:

result[letter]=0

result[letter]+=1

print(result)

count_letters("Hello")