"Explain regex" terminal utility.

explainregex.py

#!/usr/bin/env python
# encoding: utf-8
import sys, urllib2, urllib
from bs4 import BeautifulSoup 

if __name__ == '__main__':
    if len(sys.argv) < 2:
        print "Called with './explainregex therege(x)?'"
    else:
        page = urllib2.urlopen('http://rick.measham.id.au/paste/explain.pl?regex='+ urllib.quote(sys.argv[1]))
        html = BeautifulSoup(page)
        for pre in html('pre'):
            print pre.contents[0]