[Python-ideas] Make it optional

[Hernan Grecco]

On Tue, Feb 11, 2014 at 11:33 AM, anatoly techtonik <techtonik at gmail.com>wrote:

>
> I think that final decision whatever package version is prerelease or not
> should be made by package maintainer, and (s)he should have a final
> judgement over this fact. But inventors of prerelease feature didn't even
> think that people may not want and still don't want this features.
>

But package maintainers have the final judgement!  A package is NOT a
pre-release if it has a PEP 440 compliant version number without any
pre-release or development segment. A simple rule.

The problem is how to deal with old packages with non compliant versions
which now are not get installed by default. I would say:
- If you are the maintainer of the legacy package, just release a new
version with a compliant version.
- If you are the maintainer of a project that needs this legacy package,
just adjust your requirements file as described in [0]

The versioning scheme proposed in PEP440 has a lot of advantages (which are
described in the PEP). But it comes with some rules that we need to comply.

cheers,

Hernán

[0] http://www.pip-installer.org/en/latest/logic.html#pre-release-versions




On Tue, Feb 11, 2014 at 11:33 AM, anatoly techtonik <techtonik at gmail.com>wrote:

> On Tue, Feb 11, 2014 at 10:48 AM, Paul Moore <p.f.moore at gmail.com> wrote:
> > On 11 February 2014 07:20, Georg Brandl <g.brandl at gmx.net> wrote:
> >>> "Make it optional" is a very good principle for those cases
> >>> when you can not predict how users are going to use your
> >>> feature and if they need it at all.
> >>
> >> I have no idea what you are talking about.  Care to give some context?
> >
> > Anatoly has just raised a series of issues against pip, all
> > essentially reiterating the same point that he doesn't like pip's new
> > handling of prerelease vs release versions (which was thrashed out and
> > agreed in a PEP)  I assume he's trying to get support for some vague
> > meta-point here in the hope that by doing so he'll feel justified in
> > arguing further on the pip issues :-(
>
> Right. Smart people invented prerelease feature for PyPI, which works
> the following way:
>
>  - if pip thinks that your version is not PEP compliant, it won't install
> it,
>    because it thinks that everything what is not PEP aware is prerelease
>
> I think that final decision whatever package version is prerelease or not
> should be made by package maintainer, and (s)he should have a final
> judgement over this fact. But inventors of prerelease feature didn't even
> think that people may not want and still don't want this features.
>
> That's why I proposed "Make it optional" principle as an engineering
> practice for solutions that affect the whole net.
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