Question

Assume a text file “Test.txt” is already created. Using this file, write a function to create three
files “LOWER.TXT” which contains all the lowercase vowels and “UPPER.TXT” which contains all
the uppercase vowels and “DIGIT.TXT” which contains all digits.

Answer 1

import re


def vowels_digits(filename):
    with open(filename) as file:
        txt = file.read()
    with open('DIGIT.TXT', 'w') as file:
        file.write(re.sub(r'\D+', '', txt))
    with open('LOWER.TXT', 'w') as file:
        file.write(re.sub(r'[^aeiouy]+', '', txt))
    with open('UPPER.TXT', 'w') as file:
        file.write(re.sub(r'[^AEIOUY]+', '', txt))


vowels_digits('Test.txt')