scans current directory, when a file's mtime is change, execute command in args concatinated to filename

onchangedo.py

#!/usr/bin/python

import os
import time

latest = {}

while True:
    fs = os.listdir('.')
    for f in fs:
        s = os.lstat(f)
        changed = True
        if f in latest.keys():
            changed = s[8] != latest[f]
        latest[f] = s[8]
        if changed:
            print f

    time.sleep(1)

• does shallow scan
• does not take into account deleted files
• checks only mtime