A script to check whether Ash is doing a Sister Claire live-write and print the URL

Example_output.txt

The latest Sister Claire live-write started 19 hours ago at Fri, 27 Mar 2015 17:41. The URL is:
https://docs.google.com/document/d/1qpj_QxQSRWMbd_S1PVHAM4aBpb-RrskMIqcMHS4i0F0/edit

livewrite.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import arrow
from dateutil.tz import tzlocal
import requests
from lxml import etree, html
from lxml.etree import tostring
from humanize import naturaltime

ash_rss = 'http://summerlightning.tumblr.com/rss'
rss_page = requests.get(ash_rss)
rss = etree.fromstring(rss_page.text.encode(rss_page.encoding))
items = rss.xpath("/rss/channel/item")
for item in items:
    desc = item.xpath("./description/text()")[0]
    try:
        gdocs_link = str(html.fromstring(desc).xpath(".//a/@href[contains(., 'docs.google.com')]")[-1])
    except IndexError:
        continue
    pubdate = arrow.get(item.xpath("./pubDate/text()")[0],
                        'ddd, DD MMM YYYY HH:mm:ss Z')
    pubdate = arrow.get(pubdate.astimezone(tzlocal()))
    print "The latest Sister Claire live-write started %s at %s. The URL is:\n%s" % \
        (pubdate.humanize(),
         pubdate.format("ddd, DD MMM YYYY HH:mm"),
         gdocs_link)
    break
else:
    print "No recent Sister Claire live-writes found in the RSS feed."