[Numpy-discussion] Proposal of timeline for dropping Python 2.7 support

[Matthias Bussonnier]

> If a wheel is not available for the client platform, pip will try to install the latest version of the source distribution (.tar.gz or .zip) which I think is the cause of the problem here.

Unless the sdist is tagged with require_python and users have
recent-enough pip. Which is what was referred to earlier as
"Automagically".
This behavior is "new" (Nov/Dec 2016). The upstream patches were
written (in part) by the IPython/Jupyter team, for this exact purpose,
to not install an incompatible sdists.
(Works great I can share download graphs for IPython[0])

It _does_ require to have a version of pip which is not decades old
though, and may not work if you use a pypi proxy which is not pep 503
compliant (which happens, we got bug report, users then complained to
IT who fixed it).
-- 
M

On Mon, Nov 13, 2017 at 10:14 AM, Olivier Grisel
<olivier.grisel at ensta.org> wrote:
> If a wheel is not available for the client platform, pip will try to install
> the latest version of the source distribution (.tar.gz or .zip) which I
> think is the cause of the problem here.
>
> --
> Olivier
>
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