Bill wants to get his contact images back from Google. Leo says that Google has a data take out option via Google Take Out. He can get anything archived that he's posted to Google. Also check out DataLiberation.org on how to get stuff out of Google.
The Chatroom says that Google TakeOut won't do it, but there is an API for Google Calendar that he can use to make a simple "get" request via python. Here's a place to get started - http://j-dii.blogspot.com/2010/02/python-script-vcf-photo-to-google.html