Why was this removed?  Now the "Store the response from the last request in the connection object" comment above is a lie.

Storing the response in the connection object is an extension that isn't upstream in active resource, let alone pyactiveresource.  This was added in commit 460f2d840079fed856a20b1b5e1c70b3ea741a20 because we have a similar extension in the shopify_api ruby client (https://github.com/Shopify/shopify_api/blob/master/lib/active_resource/connection_ext.rb#L9).