import sys
dir(sys)
help(sys)

import glob
catalog = '/home/user/video'
for videofile in glob.glob(catalog + "/*.avi"):
    print videofile

#!/usr/bin/env python
#-*-coding:utf8-*-
import glob
import subprocess
def probe_file(filename):
    cmnd = ['ffprobe', '-show_format', '-pretty', '-loglevel', 'quiet', filename]
    p = subprocess.Popen(cmnd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    print filename
    out, err =  p.communicate()
    print "==========output=========="
    print out
    if err:
        print "========= error ========"
        print err
if __name__ == '__main__:
    catalog = '/home/user/video'
    for videofile in glob.glob(catalog + "/*.avi"):
        probe_file(videofile)

~ $ python
>>> help()
help>
help> modules
..
...
help> itertools