normalize file names recursively

normalize.py

#!/usr/bin/python3 -tt

import sys, os

def normalize(s):
    subs = [ ('. ', '.' ), (' - ','-'), (', ',','), (' + ', '+'),
             (' & ', '+'), (' ','_'), ('[',''), (']',''), 
             ('(',''), (')',''), ("'",""), ('"',''), 
             ('#','no'), ('!', ''), ('*', '') ]
    for a, b in subs:
        s = s.replace(a, b)
    return s

def main():
    if len(sys.argv) >= 2:
        baseDir  = sys.argv[1]
    else:
        baseDir  = os.getcwd()

    for root, subDirs, files in os.walk(baseDir, topdown=False):
        # Move files before directories, else we would have to os.walk twice
        for f in files:
            # It's important to not normalize the root directory
            f_path = os.path.join(root, f)
            n_path = os.path.join(root, normalize(f))
            if f_path != n_path:
                print(f_path + " => " + n_path)
                os.rename(f_path, n_path)

        # Move directories
        for d in subDirs:
            # It's important to not normalize the root directory
            d_path = os.path.join(root, d)
            n_path = os.path.join(root, normalize(d))
            if d_path != n_path:
                print(d_path + " => " + n_path)
                os.rename(d_path, n_path)

if __name__ == "__main__":
    main()