Exercise for reference: 

Make a script that prints out letters of the English alphabet from a to z, one letter per line in the terminal.

Answer: 

import string

for letter in string.ascii_lowercase:
    print(letter)

Explanation: 

string  is a built-in module and string.ascii_lowercase  returns a string object containing all 26 letters of the English alphabet. Then we simply iterate through that string and print out the string items.