[Python-Dev] Dealing with mimetools usage in the stdlib

[Brett Cannon]

On my quest to remove warnings raised in 2.6 when Python is run with
-3, the issue of dealing with mimetools has come up in terms of
backwards-compatibility. For instance, in BaseHTTPServer, the headers
attribute on BaseHTTPRequestHandler is an instance of
mimetools.Message. But in 3.0 it is an instance of
http.client.HTTPMessage.

So my question is, should 2.6 be changed to match 3.0, or should
deprecation warnings for mimetools (and possibly other modules) just
be silenced so as to not risk breaking backwards-compatibility?

-Brett