Exercise from automate boring stuff

Creating the Gaps

#!python3

import os
import re

"""As an added challenge, write another program that can insert gaps into numbered files so that a new file can be 
added. """

working_directory = input("Input your working directory with files: ")
numbers = [[correct_number + 1, number_of_file] for foldername, subfolder, filename in
           os.walk(working_directory) for correct_number, number_of_file in enumerate(filename)]
regex = re.compile(r'''[0-9]{1,10}''')

for number, filename in numbers:
    result = regex.findall(str(filename))
    try:
        if str(''.join(result)) == str(number):
            os.rename(working_directory + f"\\{filename}",
                      working_directory + f"\\{number+1}.JPG")
    except FileExistsError:
        continue