Count file extensions recursivly

countex.py

#!/usr/bin/env python
# Do What the Fuck You Want to Public License
# for Olli with love, for his birthday

from __future__ import print_function

import argparse
import os
import os.path
import sys

def main():
    parser = argparse.ArgumentParser(description="Count file extensions recursively.")
    parser.add_argument("directory")
    parser.add_argument("-N", type=int, default=20, dest='howmany')
    parser.add_argument("--verbose", help="increase output verbosity",
                        action="store_true")
    args = parser.parse_args()

    print('Listening for %s' % args.directory)
    cnt = {}
    for root, directories, filenames in os.walk(args.directory):
        for f in filenames:
            if args.verbose:
                print(f, file=sys.stderr)

            name, ext = os.path.splitext(f)
            if not len(ext):
                print('ignoring %s' % name, file=sys.stderr)
                continue

            if ext not in cnt:
                cnt[ext] = 1
            else:
                cnt[ext] += 1

    print('Done scanning!', file=sys.stderr)
    for ext, howmany in sorted(cnt.iteritems(), key=lambda x: x[1], reverse=True):
        print('%s:\t%d' % (ext, howmany))

if __name__ == '__main__':
    main()