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


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