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authorV3n3RiX <venerix@koprulu.sector>2022-07-24 20:54:05 +0100
committerV3n3RiX <venerix@koprulu.sector>2022-07-24 20:54:05 +0100
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tree01ac0b4134970567587e7176ffc531a404898186 /metadata/news/2020-04-22-python3-7/2020-04-22-python3-7.en.txt
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-Title: Python 3.7 to become the default target
-Author: Michał Górny <mgorny@gentoo.org>
-Posted: 2020-04-22
-Revision: 1
-News-Item-Format: 2.0
-Display-If-Installed: dev-lang/python:3.6
-Display-If-Installed: dev-lang/python:3.7
-
-On 2020-05-06 (or later), Python 3.7 will replace Python 3.6 as one
-of the default Python targets for Gentoo systems. The new default
-values will be:
-
- PYTHON_TARGETS="python2_7 python3_7"
- PYTHON_SINGLE_TARGET="python3_7"
-
-If you have not overriden these variables on your system, then your
-package manager will switch to the new targets immediately. In order
-to avoid dependency conflicts, please clean stray packages up
-and rebuild/upgrade all packages with USE flag changes after the change,
-e.g.:
-
- emerge --depclean
- emerge -1vUD @world
- emerge --depclean
-
-Please note that during the system upgrade some of the package
-dependencies may temporarily become missing. While this should not
-affect programs that are already fully loaded, it may cause ImportErrors
-when starting Python scripts or loading additional modules (only scripts
-running Python 3.6 are affected).
-
-In order to improve stability of the upgrade, you may choose to
-temporarily enable both targets, i.e. set in /etc/portage/package.use
-or its equivalent:
-
- */* PYTHON_TARGETS: python3_6 python3_7
- */* PYTHON_SINGLE_TARGET: -* python3_6
-
-This will cause the dependencies to include both Python 3.6 and 3.7
-support whenever possible, throughout the next system upgrade. Once all
-packages are updated, you can restart your scripts, remove the setting
-and start another upgrade in order to cleanly remove Python 3.6.
-
-There are still some Gentoo packages that do not support Python 3.7.
-We will be pushing updates to these packages as time permits. However,
-some of them will probably be removed instead.
-
-If you would like to postpone the switch to Python 3.7, you can copy
-the current value of PYTHON_TARGETS and/or PYTHON_SINGLE_TARGET
-to /etc/portage/package.use or its equivalent:
-
- */* PYTHON_TARGETS: -python3_7 python3_6
- */* PYTHON_SINGLE_TARGET: -* python3_6
-
-If you would like to migrate your systems earlier, you can do
-the opposite. Note that if you are running ~arch, you may want to go
-straight for Python 3.8 at this point.
-
-Please note that this switch is long overdue. Python 3.6 is no longer
-receiving bug fixes. Its planned end-of-life is 2021-12-23 but we will
-probably remove it earlier than that. [1]
-
-All above snippets assume using package.use to control USE flags.
-If you still have make.conf entries for these targets, you need
-to remove them. While using make.conf is possible, it is strongly
-discouraged as it does not respect package defaults. The latter
-can help you keep some of Python 3.6 packages without the need to
-explicitly toggle flags per-package.
-
-[1] https://devguide.python.org/#status-of-python-branches