Clean / unquote url encode sequences in downloaded files.

clean_file_name.py

#!/usr/bin/env python

from __future__ import generators
from functools import partial
import os, os.path
try:
    from urllib import unquote
except ImportError:
    from urllib.parse import unquote

def legalize_win_file_name(filename, substituent='.'):
    invalid_chars = r'\/:*?"<>|'
    return ''.join(substituent if c in invalid_chars else c for c in filename)

def clean_name(filename, windows_name=True):
    clean_name = unquote(filename)
    return legalize_win_file_name(clean_name) if windows_name else clean_name

def rename_file(dirname, filename):
    original, target = os.path.join(dirname, filename), os.path.join(dirname, clean_name(filename))
    if original == target:
        # print("no change: %s"%(original, ))
        return

    print("rename %s to %s" % (original, target))
    os.rename(original, target)

def walk_folder(topdir):
    for dirpath, dirnames, filenames in os.walk(topdir):
        list(map(partial(rename_file,dirpath), filenames))

if __name__ == "__main__":
    walk_folder('.')