print urls with 404

checker.py

import fileinput
import sys
import urllib2

def check_404(url):
    try:
        urllib2.urlopen(url);
    except urllib2.HTTPError as e:
        if e.code == 404:
            print url

if __name__ == '__main__':
    for line in fileinput.input():
        check_404(line.strip())