Rename files with Python

regex_rename.bat

@ECHO OFF
SET PATTERN=%1
SET REPLACE=%2
python %~dp0/regex_rename.py %PATTERN% %REPLACE%

regex_rename.py

import argparse, os, re

parser = argparse.ArgumentParser()
parser.add_argument('pattern', help='File pattern you looking for')
parser.add_argument('replace', help='New file name pattern')
args = parser.parse_args()

path = os.curdir
replace = args.replace

comp = re.compile(args.pattern)
for f in os.listdir(path):
    full_path = os.path.join(path, f)
    if os.path.isfile(full_path):
        
        match = comp.search(f)
        if not match :
           continue

        try:
            new_name = match.expand(replace)
            new_name = os.path.join(path, new_name)
        except re.error:
            continue
        
        if os.path.isfile(new_name):
            print('%s -> %s skipped' % (f, new_name))
        else:
            os.rename(full_path, new_name)