[IPython-dev] Requiring distribute on Windows

Brian Granger ellisonbg@gmail....
Fri Jun 24 14:20:07 CDT 2011


On Fri, Jun 24, 2011 at 11:52 AM, MinRK <benjaminrk@gmail.com> wrote:
> On Fri, Jun 24, 2011 at 11:01, Brian Granger <ellisonbg@gmail.com> wrote:
>> Hi,
>>
>> In the course of testing IPython.parallel on Windows, Min and I have
>> discovered that ipcluster won't work on Windows unless distribute is
>> installed and used to install IPython.  The reason is that setuptools
>> has a bug that interacts with multiprocessing in a subtle, nasty way.
>> Min has been using distribute all along for testing and dev., so we
>> didn't see it until now.  This leads to a question:
>>
>> Should we required distribute to be installed and used to install
>> IPython on Windows?
>
> The issue is that distribute writes scripts with the traditional `if
> __name__ == '__main__'` block, whereas
> vanilla setuptools does not, breaking any use of multiprocessing in
> entry points on Windows (all child processes will enter the outer
> loop, launching an infinite number of children).
>
> I *have* figured out a way to catch this in the entry point itself
> using inspect, so we shouldn't have to depend on distribute, if this
> fix is acceptable:
>
> https://github.com/minrk/ipython/commit/ab437a4d476f7819cf47a5dbb5ee6d40f66a7958

I will look at this later today.  That would probably be better than
requiring distribute though.

Cheers,

Brian

> -MinRK
>
>>
>> I am not sure how this will affect the .msi installer.  We might be
>> able to relax the requirement for that installer as the command line
>> scripts are created differently.
>>
>> Cheers,
>>
>> Brian
>>
>> --
>> Brian E. Granger
>> Cal Poly State University, San Luis Obispo
>> bgranger@calpoly.edu and ellisonbg@gmail.com
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>>
>



-- 
Brian E. Granger
Cal Poly State University, San Luis Obispo
bgranger@calpoly.edu and ellisonbg@gmail.com


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