YouTube subscriptions feed parser/simplifier. mod_wsgi version

youtube_subs.py

#! /usr/bin/env python

from time import gmtime, strftime
import urllib2 as urllib
import re

from BeautifulSoup import BeautifulSoup, Tag

###
user = 'gbrlgrct'
###

feed_url = 'http://gdata.youtube.com/feeds/base/users/%s/newsubscriptionvideos?client=ytapi-youtube-user&v=2'

base = '<?xml version="1.0" encoding="UTF-8" ?>\
<rss version="2.0">\
	<channel></channel>\
</rss>'

class Subscriptions(object):
	def __init__(self, user):
		global feed_url
		self.user = user
		self.feed_url = feed_url % user
	
	def out(self):
		global base
		# self-closing category tags make BeautifulSoup act weird
		a = BeautifulSoup(re.sub('<category[^>]*>', '', urllib.urlopen(self.feed_url).read()))
		b = BeautifulSoup(base)
		
		b.rss.channel.append('<title>YouTube feed for %s</title>' % self.user)
		b.rss.channel.append('<description></description>')
		b.rss.channel.append('<link>%s</link>' % self.feed_url.replace('&', '&amp;'))
		b.rss.channel.append('<lastBuildDate>%s</lastBuildDate>' % strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime()))
		
		items = a.findAll('entry')
		for item in items:
			new = Tag(b, 'item')
			b.rss.channel.append(new)
			
			new.append('<title>[%s] %s</title>' % (item.find('name').renderContents(), item.find('title').renderContents()))
			
			new.append('<description></description>')
			new.append('<link>'+item.find('link', rel='alternate')['href'].split('&')[0]+'</link>')
			
			new.append('<guid isPermaLink="false">%s</guid>' % item.find('id').renderContents())
			
			# Too lazy to convert date to TFC-822
			new.append('<pubDate>%s</pubDate>' % item.find('published').renderContents())
		
		return b.prettify()

def application(environ, respond):
	global user
	out = Subscriptions(user).out()
	respond('200 OK', [('Content-Type', 'application/rss+xml')])
	return [out]