steve at REMOVE-THIS-cybersource.com.au
Fri Oct 8 02:31:56 CEST 2010
On Fri, 08 Oct 2010 00:23:30 +0000, kj wrote:
> In <87hbgxlk67.fsf at gmail.com> Arnaud Delobelle <arnodel at gmail.com>
>>A simple fix is to use hash(frozenset(self.items())) instead.
> Thanks for pointing out the hash bug. It was an oversight: I meant to
> def __hash__(self):
> return hash(sorted(tuple(self.items())))
> I imagine that frozenset is better than sorted(tuple(...)) here, but
> it's not obvious to me why.
Because it's always better to use a well-written, fast, efficient,
correct, well-tested wheel than to invent your own slow, incorrect
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