On Jan 05, 2012, at 10:40 PM, Christian Heimes wrote: >Hey Barry, stop stealing my ideas! :) I've argued for these default >settings for days.
:) >I've suggested the env var PYRANDOMHASH. It's easy to set env vars in >Apache. For example Debian/Ubuntu has /etc/apache2/envvars. For consistency, it really should be PYTHONSOMETHING. I personally don't care how long it is (e.g. PYTHONIOENCODING). >Settings for PYRANDOMHASH: > > PYRANDOMHASH=1 > enable randomized hashing function > > PYRANDOMHASH=/path/to/seed > enable randomized hashing function and read seed from 'seed' > > PYRANDOMHASH=0 > disable randomed hashing function Why not PYTHONHASHSEED then? >Since there isn't an easy way to set env vars in a shebang line since >something like > > #!/usr/bin/env PYRANDOMHASH=1 python2.7 > >doesn't work, we could come up with a solution the shebang. We have precedence for mirroring startup options and envars, so it doesn't bother me to add such a switch to Python 3.3. It *does* bother me to add a switch to any stable release. >IMHO the setting for the default setting should be a compile time >option. It's reasonable easy to extend the configure script to support >--enable-randomhash / --disable-randomhash. The MS VC build scripts can >grow a flag, too. > >I still think that the topic needs a PEP. A couple of days ago I started >with a PEP. But Guido told me that he doesn't see a point in a PEP >because he prefers a small and quick solution, so I stopped working on >it. However the arguments, worries and ideas in this enormous topic have >repeated over and over. We know from experience that a PEP is a great >way to explain the how, what and why of the change as well as the paths >we didn't take. One way to look at it is to have a quick-and-dirty solution for stable releases. It could be suboptimal from a ui point of view because of backward compatibility issues. The PEP could then outline the boffo perfect solution for Python 3.3, which a section on how it will be backported to stable releases. Cheers, -Barry
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