Recursively rename multiple files

renameFiles.py

#!/usr/bin/env python3

import glob
import os
import re
import sys


def printUsage():
    print("%s <wildcard> <replacement wildcard>" % sys.argv[0])
    print("Example: %s * Ui*" % sys.argv[0])
    print("Only one asterisk may be used in the wildcards.")


def renameFiles(target_dir, wildcard, replacement):
    wildcardRegex = wildcard.replace('.', '\\.').replace('*', '(.*)')
    replacementRegex = replacement.replace('*', '\\1')
    infiles = glob.glob(target_dir + '/' + wildcard)
    for infile in infiles:
        outfile = re.sub(wildcardRegex, replacementRegex, infile);
        print(infile, "->", outfile)
        os.rename(infile, outfile)


def main():
    if len(sys.argv) == 3:
        wildcardList = sys.argv[1].split("*")
        replacementList = sys.argv[2].split("*")
        if len(wildcardList) == 2 and len(replacementList) == 2:
            for root,ds,files in os.walk('.'):
                for d in ds:
                    td = root + '/' + d
                    renameFiles(td, "*".join(wildcardList), "*".join(replacementList))
        else:
            printUsage()
    else:
        printUsage();


if __name__ == "__main__":
    main()