While putting together the US Technical Conferences calendar over the past week or two, I noticed that the location of probably 80% of them (I’m guessing – it’s probably higher) is somewhere in California. I’ve always noticed that there is this trend to hold technical conferences in California, because there’s an enormous concentration of technology workers there. But c’mon! How about an OSCON East or something?
Anyway, I have more going on this holiday season than usual, but I always try to spend some of the downtime doing something interesting, and the Google Maps API is probably one of the few Google APIs I’ve never used. What better way to expose the inequity in conference locales than to plot all of my Tech Conference calendar events on a Google Map? Oh, and it’d be useful for people to be able to visually see where conferences are, and maybe color-code the markers according to Q1 2009, Q2 2009, etc.
By the way, this isn’t like some new fantastic idea I had. Someone else came up with a solution that works quite some time ago, but it involved several steps including Yahoo pipes and stuff. I really just wanted a script that, called with a parameter or two, would dump the appropriate .html file into a directory, or better, would just be called directly from the browser and take input (baby steps). Later, there are aspirations of plugging it into Django, an area where Google Maps has already seen some integration work, and another victim of my recent exploration/experimentation.
So, I already have some prototype code that might be useful for others who are maybe just starting out with the Calendar API. This bit of code will create an authenticated CalendarService object and dump the title and location of events on a calendar of your choosing. The assumption here is that the location is in some form that is parseable by whatever geocoding service you decide to use. For me (for now), I’m just using city and state locations – not addresses. Here goes:
#!/usr/bin/env python try: from xml.etree import ElementTree # for Python 2.5 users except ImportError: from elementtree import ElementTree import gdata.calendar.service import gdata.service import atom.service import gdata.calendar import getpass import atom import getopt import sys import string import time import geopy calendar_service = gdata.calendar.service.CalendarService() calendar_service.email = 'firstname.lastname@example.org' calendar_service.password = getpass.getpass() calendar_service.ProgrammaticLogin() cal_id = 'id_from_calendar_settings_page_or_email_for_your_default_cal' feed = calendar_service.GetCalendarEventFeed('/calendar/feeds/'+cal_id+'/private/full') geo = geopy.geocoders.Google('your_google_api_key') print feed.title.text # the name of the calendar we're sucking feeds out of. for event in feed.entry: print event.title.text, event.where.value_string # The event name, and location. (lat,lon) = geo.geocode(event.where.value_string) print lat,lon
It’s a start. Next I need to figure out the steps between this stage and making the actual cool stuff happen. Hopefully I’ll be back with an update right around the new year.