Bulk rename with Python

regex_rename.py

import os, re

path = 'C:/Users/Test/test'
pattern = '^([A-Z]+)\-([0-9]+).*$'
replace = r"\2-\1.mkv"

comp = re.compile(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)