Reverse Geocoding with Geopy
Geopy is an awesome geocoding toolbox for Python, that is now even more awesome.
I actually added the reverse geocoding feature a while ago, but didn’t get around to writing up how to use or install it until now. Right now it’s in a separate but stable development branch.
Installation and usage instructions are here: http://code.google.com/p/geopy/wiki/ReverseGeocoding