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Re: Hash stability

References (2 earlier) <4F1205A7.70303@modelnine.org> <jeu8t4$2kc$1@dough.gmane.org> <4F12BC8A.9040205@modelnine.org> <jeugdp$e1b$1@dough.gmane.org> <4F12F9D8.5080904@modelnine.org>
Date 2012-01-16 03:13 +1100
Subject Re: Hash stability
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.4775.1326643983.27778.python-list@python.org> (permalink)

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On Mon, Jan 16, 2012 at 3:07 AM, Heiko Wundram <modelnine@modelnine.org> wrote:
> I don't know the prevalence of suds, but I guess there's more people than me
> using it to query SOAP-services - all of those will be affected if the
> hash() output is changed. Additionally, if hash() isn't stable between runs
> (the randomized hash() solution which is preferred, and would also be my
> preference), suds caching becomes completely useless. And for the results,
> see above.

Or you could just monkey-patch it so that 'hash' points to an old
hashing function. If the current hash() is kept in builtins as (say)
hash_320() or hash_272() or something, then anyone who wants the old
version of the hash can still get it.

Of course, it's still dodgy to depend on the stability of something
that isn't proclaimed stable, and would be far better to use some
other hashing algorithm (MD5 or SHA for uberreliability).

ChrisA

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Thread

Hash stability Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-01-14 04:42 +0000
  Re: Hash stability Peter Otten <__peter__@web.de> - 2012-01-14 10:46 +0100
  Re: Hash stability Heiko Wundram <modelnine@modelnine.org> - 2012-01-14 23:45 +0100
  Re: Hash stability Chris Angelico <rosuav@gmail.com> - 2012-01-15 11:36 +1100
    Re: Hash stability Bryan <bryanjugglercryptographer@yahoo.com> - 2012-01-15 04:03 -0800
      Re: Hash stability Chris Angelico <rosuav@gmail.com> - 2012-01-15 23:21 +1100
  Re: Hash stability Roy Smith <roy@panix.com> - 2012-01-14 21:26 -0500
    Re: Hash stability Terry Reedy <tjreedy@udel.edu> - 2012-01-14 23:07 -0500
  Re: Hash stability Stefan Behnel <stefan_ml@behnel.de> - 2012-01-15 11:13 +0100
  Re: Hash stability Heiko Wundram <modelnine@modelnine.org> - 2012-01-15 12:46 +0100
  Re: Hash stability Peter Otten <__peter__@web.de> - 2012-01-15 13:22 +0100
  Re: Hash stability Heiko Wundram <modelnine@modelnine.org> - 2012-01-15 17:07 +0100
  Re: Hash stability Chris Angelico <rosuav@gmail.com> - 2012-01-16 03:13 +1100
  Re: Hash stability Heiko Wundram <modelnine@modelnine.org> - 2012-01-15 17:51 +0100
  Re: Hash stability Stefan Behnel <stefan_ml@behnel.de> - 2012-01-15 18:20 +0100
  Re: Hash stability Peter Otten <__peter__@web.de> - 2012-01-16 09:18 +0100
  Re: Hash stability Christian Heimes <lists@cheimes.de> - 2012-01-16 09:44 +0100
  Re: Hash stability Heiko Wundram <modelnine@modelnine.org> - 2012-01-16 10:15 +0100

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