[gentoo-dev] [PATCH news] 2020-02-06-python-2-7-eol: news item for py2.7 EOL

[gentoo-dev] [PATCH news] 2020-02-06-python-2-7-eol: news item for py2.7 EOL

[Michał Górny]

Signed-off-by: Michał Górny <mgorny@gentoo.org>
---
 .../2020-02-06-python-2-7-eol.en.txt          | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 2020-02-06-python-2-7-eol/2020-02-06-python-2-7-eol.en.txt

diff --git a/2020-02-06-python-2-7-eol/2020-02-06-python-2-7-eol.en.txt b/2020-02-06-python-2-7-eol/2020-02-06-python-2-7-eol.en.txt
new file mode 100644
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+++ b/2020-02-06-python-2-7-eol/2020-02-06-python-2-7-eol.en.txt
@@ -0,0 +1,51 @@
+Title: Python 2.7 went EOL
+Author: Michał Górny <mgorny@gentoo.org>
+Posted: 2020-02-06
+Revision: 1
+News-Item-Format: 2.0
+Display-If-Installed: dev-lang/python:2.7
+
+Python 2.7 has reached its end-of-life by 2019-12-31.  Python package
+upstreams have started removing Python 2 compatibility code from their
+packages more aggressively.  This includes common dependencies such as
+dev-python/pytest, dev-python/setuptools and dev-python/sphinx.  While
+we realize that many packages are still dependent on Python 2, providing
+full support for it exceeds our maintenance capabilities.
+
+Upstream is planning to make one more release of dev-lang/python:2.7
+in April 2020.  We are going to continue maintaining and patching
+the interpreter for as long as it is feasible, most likely even after
+all Python 2 packages are gone from Gentoo.
+
+At the same time, we are actively working towards switching
+the distribution to Python 3.  Whenever possible, we are removing
+Python 2 support from packages.  It will remain available for
+the packages missing Python 3 compatibility and their dependencies
+for some more time.  However, packages that have little chances of being
+ported will eventually be removed.
+
+If you are still using Python 2 for your projects, we strongly recommend
+you to migrate away.  For the time being, it is preferable to use
+dev-python/virtualenv or a similar solution rather than ebuilds,
+to install the dependencies for your projects locally.
+
+Regular Gentoo systems will be migrated off Python 2 gracefully.  It may
+be necessary to use --changed-deps or a similar option during system
+upgrades whenever they become blocked by Python 2 packages installed
+earlier.
+
+If you wish to remove Python 2.7 entirely sooner, you can try removing
+python2_7 from PYTHON_TARGETS.  However, this will require adding
+explicit package.use entries if some of the installed packages still
+require Python 2.  An example package.use entry follows:
+
+  # disable py2.7 without altering the other flags
+  */* PYTHON_TARGETS: -python2_7
+  # enable py2.7 for setuptools
+  dev-python/setuptools PYTHON_TARGETS: python2_7
+  # switch a single-impl package to 2.7
+  dev-embedded/libftdi PYTHON_TARGETS: python2_7
+  dev-embedded/libftdi PYTHON_SINGLE_TARGET: -* python2_7
+
+Note that package.use entries are not necessary for packages that
+support one implementation only (i.e. do not support Python 3 at all).
-- 
2.25.0

Re: [gentoo-dev] [PATCH news] 2020-02-06-python-2-7-eol: news item for py2.7 EOL

[Pacho Ramos]

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El mié, 05-02-2020 a las 22:20 +0100, Michał Górny escribió:
> [...]
> +If you are still using Python 2 for your projects, we strongly recommend
> +you to migrate away.  For the time being, it is preferable to use
> +dev-python/virtualenv or a similar solution rather than ebuilds,
> +to install the dependencies for your projects locally.

Is there any link that could provide some guidance about the usage of
pip+virtualenv?

I could only find this
https://wiki.gentoo.org/wiki/Pip

relying on https://wiki.archlinux.org/index.php/Python/Virtual_environment for
virtualenv information.

In my case I am used to pip (as regular user of course), but not with
virtualenv... then, maybe pointing people to some instructions about how to
properly use virtualenv+pip in Gentoo would be useful 

Thanks

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Re: [gentoo-dev] [PATCH news] 2020-02-06-python-2-7-eol: news item for py2.7 EOL

[Michał Górny]

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On Wed, 2020-02-05 at 22:34 +0100, Pacho Ramos wrote:
> El mié, 05-02-2020 a las 22:20 +0100, Michał Górny escribió:
> > [...]
> > +If you are still using Python 2 for your projects, we strongly recommend
> > +you to migrate away.  For the time being, it is preferable to use
> > +dev-python/virtualenv or a similar solution rather than ebuilds,
> > +to install the dependencies for your projects locally.
> 
> Is there any link that could provide some guidance about the usage of
> pip+virtualenv?
> 
> I could only find this
> https://wiki.gentoo.org/wiki/Pip
> 
> relying on https://wiki.archlinux.org/index.php/Python/Virtual_environment for
> virtualenv information.
> 
> In my case I am used to pip (as regular user of course), but not with
> virtualenv... then, maybe pointing people to some instructions about how to
> properly use virtualenv+pip in Gentoo would be useful 
> 

I'm not aware of any.  However, I don't think we ought to babysit people
on virtualenv if they really do serious python programming.

-- 
Best regards,
Michał Górny


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