Copy and rename files

import os
import re
import shutil

input_directory = '/Users/Kristina/PycharmProjects/testing/input'
output_directory = '/Users/Kristina/PycharmProjects/testing/output'

for filename in os.listdir(input_directory):
    match_result = re.match('(.+)(\d{2})-(\d{2})-(\d{4})(.+)', filename)
    if (match_result):
        filename_first_part = match_result.group(1)
        month = match_result.group(2)
        day_of_month = match_result.group(3)
        year = match_result.group(4)
        filename_last_part = match_result.group(5)
        new_filename = filename_first_part + year + '.' + month + '-' + day_of_month + filename_last_part
        full_source_path = os.path.join(input_directory, filename)
        full_destination_path = os.path.join(output_directory, new_filename)
        print('Copying file ' + full_source_path + ' to ' + full_destination_path)
        shutil.copy2(full_source_path, full_destination_path)