This file automatically pulls the current calendar information for the 4 calendars published at schedule.mactech.com for MacTech 2013 and builds 4 separate .ics files with the information.

mactech_2013_ical.py

from icalendar import Event, Calendar
from datetime import datetime
import urllib2, urllib, pytz, dateutil.parser
import xml.etree.ElementTree as ET

ical_rss_base_url = 'http://schedule.mactech.com/rss/rss2.0.php?cal=%s&cpath=&rssview=month'

ical_rss_calendars = ['Dev Track', 'General Schedule', 'IT Track', 'Special']

# X-APPLE-CALENDAR-COLOR
ical_colors = {'Dev Track': '#0E61B9',
               'General Schedule': '#44A703',
               'IT Track': '#F64F00',
               'Special': '#711A76'}

timezone = pytz.timezone('America/Los_Angeles')
mod_time = datetime.now(timezone)

for cal_name in ical_rss_calendars:
    extended_name = 'MacTech 2013 - %s' % cal_name
    # Get the RSS for the calendar week in question
    http_conn = urllib2.urlopen((ical_rss_base_url % cal_name).replace(' ', '%20'))
    rss_xml = http_conn.read()
    http_conn.close()
    # Create the base calendar object
    cal = Calendar()
    cal.add('X-WR-CALNAME', extended_name)
    cal.add('prodid', '-//frogor//is awesome//EN')
    cal.add('version', '2.0')
    cal.add('X-APPLE-CALENDAR-COLOR', ical_colors[cal_name])
    cal.add('X-WR-TIMEZONE', 'America/Los_Angeles')
    # Parse in event objects
    xml_cal = ET.fromstring(rss_xml)
    # Pull out all the event objects
    for an_event in xml_cal.find('channel').findall('item'):
        # Pull the attributes we need:
        event = Event()
        # title = summary
        # title.text needs to have the date split out: Wed Nov 6 2013: Dev: D....
        event.add('summary', urllib.unquote(an_event.find('title').text.split(': ',1)[-1]))
        # If a location is specified, add one:
        if an_event.find('{http://purl.org/rss/1.0/modules/event/}location') is not None:
            event.add('location', urllib.unquote(an_event.find('{http://purl.org/rss/1.0/modules/event/}location').text.replace('+','%20')))
        # If notes/description is specified, add one:
        if (an_event.find('description') is not None) and (an_event.find('description').text.split('M: ',1)[-1]):
            event.add('description', urllib.unquote(an_event.find('description').text.split('M: ',1)[-1]))
        # dtstart = startdate
        event.add('dtstart', dateutil.parser.parse(an_event.find('{http://purl.org/rss/1.0/modules/event/}startdate').text).replace(tzinfo=timezone))
        # dtend = enddate
        event.add('dtend', dateutil.parser.parse(an_event.find('{http://purl.org/rss/1.0/modules/event/}enddate').text).replace(tzinfo=timezone))
        # dtstamp = mod_time
        event.add('dtstamp', mod_time)
        event['uid'] = an_event.find('guid').text.split('uid=',1)[-1][:36]
        cal.add_component(event)
    f = open('%s.ics' % extended_name, 'wb')
    f.write(cal.to_ical())
    f.close()