[Distutils] Platform tags for OS X binary wheels

[Chris Barker - NOAA Federal]

On Nov 6, 2015, at 3:57 PM, Robert McGibbon <rmcgibbo at gmail.com> wrote:

I'm using the Python from the Miniconda installer with py35 released last
week.


Then you should not expect it to be able to find compatible binary wheels
on PyPi.

Pretty much the entire point of conda is to support Numpy and friends. It's
actually really good that it DIDN'T go and install a binary wheel.

You want:

conda install numpy

Trust me on that :-)

There are some cases where pip installing a source package into a conda
Python is fine -- but mostly only pure-Python packages.

-CHB



What does the python.org installer build for 10.6+ return for
`distutils.util.get_platform()`?

-Robert

On Fri, Nov 6, 2015 at 2:50 PM, Ned Deily <nad at acm.org> wrote:

> In article
> <CAN4+E8GZ4JrqFcbkwaK4rkfkx-T15b_ghmATh6RAeKhqKhxzMw at mail.gmail.com>,
>  Robert McGibbon <rmcgibbo at gmail.com> wrote:
> > I just tried to run `pip install numpy` on my OS X 10.10.3 box, and it
> > proceeds to download and compile the tarball from PyPI from source (very
> > slow). I see, however, that pre-compiled OS X wheel files are available
> on
> > PyPI for OS X 10.6 and later.
> >
> > Checking the code, it looks like pip is picking up the platform tag
> through
> > `distutils.util.get_platform()`, which returns 'macosx-10.5-x86_64' on
> this
> > machine. At root, I think this comes from the
> MACOSX_DEPLOYMENT_TARGET=10.5
> > entry in the Makefile at `python3.5/config-3.5m/Makefile`. I know that
> this
> > value is used by distutils compiling python extension modules --
> presumably
> > so that they can be distributed to any target machine with OS X >=10.5 --
> > so that's good. But is this the right thing for pip to be using when
> > checking whether a binary wheel is compatible? I see it mentioned
> > <https://www.python.org/dev/peps/pep-0425/#id13> in PEP 425, so perhaps
> > this was already hashed out on the list.
>
> Are you using an OS X Python installed from a python.org installer?  If
> so, be aware that there are two different OS X installers on Python.org
> <http://python.org>
> for each current release.  One is intended for 10.5 systems, although it
> will work on later OS X systems.  The other is for 10.6 and later
> systems.  Unless you have a need to run on 10.5 or build something that
> works on 10.5, download and use the 10.6+ installers instead.  Then the
> existing whls for products like Numpy should work just fine.
>
> --
>  Ned Deily,
>  nad at acm.org
>
> _______________________________________________
> Distutils-SIG maillist  -  Distutils-SIG at python.org
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