Re msg233465: it doesn't seem like a particularly good justification to remove something that is not hurting anyone. The problem now is that because http.HTTPStatus is an enumeration, it cannot be extended, therefore when someone encounters these non-standard codes, the only option is to just use the integers. I trust what Demian is saying, that there might be some clashing between the non-standard codes, but until it's shown to be a problem removing real-world use cases just actively reduces usefulness of the library. For comparison, the module that is actually used by people includes the whole lot https://github.com/kennethreitz/requests/blob/master/requests/status_codes.py