[Python-Dev] eq vs hash (original) (raw)

Ralf Schmitt schmir at gmail.com
Fri Apr 4 16:53:52 CEST 2008

On Fri, Apr 4, 2008 at 4:38 PM, Guido van Rossum <guido at python.org> wrote:

On Fri, Apr 4, 2008 at 2:46 AM, Ralf Schmitt <schmir at gmail.com> wrote: > the news file for python 2.6 does not mention that you need to define > hash in case you define eq for a class. > This breaks some code (for me: mercurial and pyparsing). > Shouldn't this be documented somewhere (I also cannot find it in the > whatsnew file).

Well, technically this has always been the requirement.

What specific code breaks? Maybe we need to turn this into a warning in order to be more backwards compatible?

I don't feel like digging into mercurial or pyparsing code currently. sorry. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mail.python.org/pipermail/python-dev/attachments/20080404/44c2b722/attachment.htm

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