Alphabet to position of alphabet

def alphabet_position(text_string):
    dict1 = {value: (int(key) + 1) for key, value in enumerate(list(string.ascii_lowercase))}
    return " ".join([str(dict1[alp]) for alp in list(text_string.lower()) if alp.isalpha()])
    
print alphabet_position("The sunset sets at twelve o' clock.")

Output :
"20 8 5 19 21 14 19 5 20 19 5 20 19 1 20 20 23 5 12 22 5 15 3 12 15 3 11"

If you come up with the following error:

NameError: name 'string' is not defined

The way to get around it is to import string.

import string

And it should work.