Dates on the name of Whatsapp pictures are applied to the file

change_file_date_to_name_date_2_opts.py

import re
import os
import datetime
import time
from shutil import copyfile

regex_filename = \
    r'([0-9]{4})([0-9]{2})([0-9]{2})' + \
    '[\_|\-]([0-9]{2})([0-9]{2})([0-9]{2})' + \
    '.*(\.jpe?g|\.png)' + \
    '|' + \
    '([0-9]{4})([0-9]{2})([0-9]{2})' + \
    '\-WA([0-9]{4})' + \
    '.*(\.jpe?g|\.png)'

prog = re.compile(regex_filename)

files_list = os.listdir(os.curdir)
print(files_list)

def timestruct_to_str(time_struct):
    year = time_struct.tm_year
    month = time_struct.tm_mon
    day = time_struct.tm_mday
    hour24 = time_struct.tm_hour
    minute60 = time_struct.tm_min
    second60 = time_struct.tm_sec
    return [str(x) for x in [
        year, month, day, hour24, 
        minute60, second60
    ]]

k = 0
for file_name in files_list:
    match = prog.search(file_name)
    if match:
        k += 1
        if match.group(1):
            year = int(match.group(1))
            month = int(match.group(2))
            day = int(match.group(3))
            hour24 = int(match.group(4))
            minute60 = int(match.group(5))
            second60 = int(match.group(6))
        else:
            year = int(match.group(8))
            month = int(match.group(9))
            day = int(match.group(10))
            hour24 = 0
            minute60 = 0
            second60 = 0
        mtime = time.mktime(datetime.datetime(
            year, month, day, 
            hour24, minute60, second60
            ).timetuple())
        atime = time.mktime(datetime.datetime(
            year, month, day, 
            hour24, minute60, second60
            ).timetuple())
        current_file = os.path.abspath(file_name)
        current_time = time.localtime(
            os.path.getmtime(current_file)
            )
        if month != current_time.tm_mon or \
            year != current_time.tm_year or \
            day != current_time.tm_mday:
            print(
                file_name + '\n' + 
                'size\t' + str(os.path.getsize(
                    current_file)/1.0e3) + ' kB' + '\n' +
                ' current time\t' + 
                str(timestruct_to_str(current_time)) + '\n' +
                ' actual time\t' +
                str(timestruct_to_str(time.localtime(atime)))
                )                
            os.utime(current_file, (atime, mtime))
            #print('creating file ' + str(k) + ': ' + \
            #    os.path.abspath(current_file) + '; ' + str(atime))
            print(' new time\t' + str(
                timestruct_to_str(
                    time.localtime(
                        os.path.getmtime(current_file)
                        )
                    )
                ))
            print('\n'*2)

print('total ' + str(k) + ' files changed')