[Python-Dev] PEP 0404 and VS 2010

Chris Barker chris.barker at noaa.gov
Thu Nov 21 22:27:42 CET 2013

On Thu, Nov 21, 2013 at 1:12 PM, Paul Moore <p.f.moore at gmail.com> wrote:

> None of the currently available binary distribution formats
>  distinguish Windows binaries by anything other than minor version. For
> wheels (and I think eggs), this is a showstopper as the name is
> essential metadata (compatibility tags) for the other formats (wininst
> and msi) the name is merely informational - packagers could rename,
> but (a) they will forget, and (b) the users won't know if they have or
> not.


> Before we can cleanly support multiple ABIs for a single minor version
> on Windows, we need to have a resolution of this dilemma (which may be
> nothing more than "only binaries for the python.org builds are allowed
> on PyPI"...)

That's already the unstated case. But besides stackless, it some of us
are advocating that there be python.org-provided binaries built with a
newer compiler (eventually, anyway). Also, I haven't gotten a reply, but I
get the impression that Christian would like stackless-users not to have a
n easy way to get this all messed up.

the wheel namign scheme is defined by PEP 425. The bit in play here is:

The platform tag is simply distutils.util.get_platform() with all hyphens -
and periods . replaced with underscore _.

I suspect that now we have only win32 and win64 for platform_tags for the
pyton.org Windows builds. But I'm also pretty sure that, for instance,
cygwin builds use a different tag.

And the "official" python.org OS-X builds have two different platform tags
for the two builds.

So the precedent is there -- and it's easy enough to keep "win32" as the
VS2008 version, and then have a "win32_VS_2010" or whatever for a newer

That wouldn't take much to do, and it would allow pip and binary wheels to
"just work".

It would be nice if the msi installers could be similarly patched, but I
have no idea what that would take.


>  Paul
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Christopher Barker, Ph.D.

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