checker.py

import os
import re



pattern = re.compile(r"[а-яА-Я]+")
list_file = os.listdir('.')
rus_files = []
for directory in os.walk('.'):
    for item in directory[2]:
        if pattern.search(item):
            rus_files.append(directory[0] + "/"  + item)
            print("чорт, файлик на русском: " + directory[0] + "/"  + item)
with open('work.log', 'w+') as f:
    for line in rus_files:
        f.write(line + '\n')