batch rename files with regex

renamer.py

#!/usr/bin/env python3
import errno
 
__author__ = 'czbix'
 
import argparse
import os
import re
import glob
 
 
def main():
    args = parse_arg()
 
    path = args.path
    src_regex = re.compile(args.src_regex)
    dst_regex = args.dst_regex
    is_real = args.is_real

    files = glob.glob(path)
    if len(files) > 0:
        for name in files:
            rename_file(name, src_regex, dst_regex, is_real)

        if is_real:
            print("Files renamed.")
        return
 
    print("path not found: " + path)
    return errno.ENOENT
 
 
def rename_file(name, src_regex, dst_regex, is_real):
    new_name = src_regex.sub(dst_regex, name)
    if new_name == name:
        return

    print("%s -> %s" % (name, new_name))
    if is_real:
        os.rename(name, new_name)
 
 
def parse_arg():
    """
    :rtype: argparse.Namespace
    """
    parser = argparse.ArgumentParser(description="batch rename files with regex")
    parser.add_argument('path', help='the path of file or dir')
    parser.add_argument('src_regex', help='regex to match')
    parser.add_argument('dst_regex', help='regex to instead of')
    parser.add_argument('-f', action='store_true', dest='is_real',
                        help='do rename action, default action is print info only')
 
    return parser.parse_args()
 
 
if __name__ == '__main__':
    main()