The internal dictproxy class was recently exposed as types.MappingProxyType. Since it's not very discoverable that way, would anyone object if I moved things around so it was exposed as collections.MappingProxy instead? The main benefit to doing so is to get it into the table of specialised container types at the top of the collections module docs [1]. [1] http://docs.python.org/dev/library/collections Cheers, Nick. -- Nick Coghlan   |   ncoghlan@gmail.com   |   Brisbane, Australia