[Python-Dev] __eq__ vs hash

[Jason Orendorff]

On Fri, Apr 4, 2008 at 9:38 AM, Guido van Rossum <guido at python.org> wrote:
>  What specific code breaks? Maybe we need to turn this into a warning
>  in order to be more backwards compatible?

I looked at Mercurial.

It doesn't use __hash__ at all.  It uses __eq__ in two files, three total uses:
http://hg.intevation.org/mercurial/crew/file/6c4e12682fb9/mercurial/commands.py
http://hg.intevation.org/mercurial/crew/file/6c4e12682fb9/mercurial/context.py

-j