import os
import re

dir_name = "/Python/Test_folder"         # open the folder and read files
testfolder = os.listdir(dir_name)

def matching(r, s):                      # condition if there's nothing to match
match = re.search(r, s)
if match:
return match.group()
return "Files don't exist!"

matching(r'^ww[_]wwww[1][7]w+[.]w+', testfolder)  # matching the file's mask

for item in testfolder.index(matching):
if item.name(matching, s):
os.remove(os.path.join(dir_name, item))

# format of filenames not converted :  ??_????17*.*
# convert for python separarately   :  [w][w][_w][w][w][w][1][7][w]+[.][w]+
# ? - Any symbol 1..n,A..z w repeating is *
# * - Any number of symbols 1..n, A..z
# _ and 17 - in any files `