Inspired by my neurotic need to keep my downloads folder clean, naming via Peter Dodds

flowify.py

import os
import datetime

if __name__ == '__main__':
    for file in os.listdir('.'):
        if not file == 'flowify.py':
            t = os.path.getmtime(file)
            d = datetime.datetime.fromtimestamp(t)
            if not os.path.isdir(d.strftime('/Users/andyreagan/flow/%Y/%m')):
                os.mkdir(d.strftime('/Users/andyreagan/flow/%Y/%m'))
            os.rename(file,'/Users/andyreagan/flow/{0}/{1}'.format(d.strftime('%Y/%m'),file))