PYTHON

comprehensions

print([x * 2 for x in range(10) if x % 2 == 0])  # [0, 4, 8, 12, 16]

comprehension

# user data entered as name and phone number
user_data = "Elvis Presley 987-654-3210"
phone_number = [ x for x in user_data if x.isdigit()]

print(phone_number)

comprehension

# open the file in read-only mode
file = open("dreams.txt", 'r')
poem = [ line for line in file ]

for line in poem:
    print(line)