[Python-Dev] Hashing proposal: change only string-only dicts

"Martin v. Löwis" martin at v.loewis.de
Wed Jan 18 08:19:44 CET 2012

> +1 Absolutely.  We can and should make 3.3 change hashes across runs
> (behavior that can be disabled via a flag or environment variable).
> I think the issue of doctests and such breaking even in 2.7 due to hash
> order changes is a being overblown.  Code like that has already needs to
> fix its tests at least once when they want tests to pass on on both
> 32-bit and 64-bit python VMs (they have different hashes).  Do we have
> _any_ measure of how big a deal this will be before going too far here?

My concern is not about breaking doctests: this proposal will also break
them. My concern is about applications that assume that hash(s) is
stable across runs, and we do have reports that it will break


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