Reddit Frontpage Monitor

redditmonitor.py

import web
import time

seen = set()

while True:
    page = web.grab('http://www.reddit.com')
    if page:
        threads = set(page.xpath('//p[@class="title"]/a/@href||//p[@class="title"]/a/text()'))
        new_threads = threads - seen
        seen |= threads
        for url, title in new_threads:
            print u'New thread - {title} - {url}'.format(title=title, url=url)
    time.sleep(30)