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Is there any easy way to find all files in a particular directory that have any non-ASCII (ie. Unicode) characters in the filename? I'm running Windows XP x64 SP2, NTFS filesystem.

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If the filename contains no bytes above 0x7F, then it's ASCII. That doesn't mean it's Unicode, though. You should be able to this in Python as well as many other programming languages. –  martineau Jan 25 '11 at 11:55

2 Answers 2

Here's a method using Powershell:

gci -recurse "<directory_name>" | where {$_.Name -match "[^\u0000-\u007F]"}
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I ended up writing a Python script for this. Posting it in case it helps anyone. Feel free to move to StackOverflow.

import sys, os


def main(argv):
    if len(argv) != 2:
        raise Exception('Syntax: FindUnicodeFiles.py <directory>')

    startdir = argv[1]
    if not os.path.isdir(startdir):
        raise Exception('"%s" is not a directory' % startdir)

    for r in recurse_breadth_first(startdir, is_unicode_filename):
        print(r)


def recurse_breadth_first(dirpath, test_func):
    namesandpaths = [(f, os.path.join(dirpath, f)) for f in os.listdir(dirpath)]

    for (name, path) in namesandpaths:
        if test_func(name):
            yield path

    for (_, path) in namesandpaths:
        if os.path.isdir(path):
            for r in recurse_breadth_first(path, test_func):
                yield r


def is_unicode_filename(filename):
    return any(ord(c) >= 0x7F for c in filename)


if __name__ == '__main__':
    main(sys.argv)
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