I need to install Python 3.11 (currently on 3.13).
There seems to a half dozen different ways of doing it, but none seem simple and (righlty or wrongly) I was expecting it be quite a common task.
What I’ve tried:
1.Arch wiki says to install from AUR, but the AUR package for python 3.11 has barely any support and the recent comments are filled with issues…hardly inspiring confidence. So…pyenv. So I download that and it installed 3.11 in it’s own space (~/.pyenv). Nothing else seems to be able to find it there python3.11 is not recognised, even in the directory. So…
I can’t believe using an earlier version of python is so complicated, so presume I’m missing something obvious.
Any clues?
Is there a specific app that you would like to install that uses Python 3.11 or is it that you have a project that uses it?
In any case, you could use Distrobox to set up an environment that is just for that app or project, while keeping your system up-to-date with the latest Python.
There’s also this: https://github.com/FFY00/arch-python-repo
xircon
January 25, 2025, 10:02pm
4
DO NOT downgrade python, it will break your system. (sorry for shouting).
2 Likes
Didn’t know that it would do that.
2 Likes
xircon
January 25, 2025, 10:08pm
6
There is a lot of stuff that depend on 3.13, try and remove python:
sudo pacman -R python 22:06:54
checking dependencies...
error: failed to prepare transaction (could not satisfy dependencies)
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Removing python is different than downgrading it. I just did it for the hell of it.
[ricklinux@rick-ms7c37 ~]$ pacman -Qi python
Name : python
Version : 3.11.3-1
Description : Next generation of the python high-level scripting language
Architecture : x86_64
URL : https://www.python.org/
Licenses : custom
Groups : None
Provides : python3
Depends On : bzip2 expat gdbm libffi libnsl libxcrypt openssl zlib
Optional Deps : python-setuptools
python-pip
sqlite [installed]
mpdecimal: for decimal [installed]
xz: for lzma [installed]
tk: for tkinter
Required By : fwupd glances libixion liborcus libreoffice-fresh meld python-annotated-types
python-cairo python-capng python-colorama python-dbus python-defusedxml
python-gobject python-orjson python-packaging python-psutil python-pycups
python-pydantic python-pydantic-core python-pyqt5-sip python-shtab python-termcolor
python-typing_extensions python-yaml reflector rhythmbox samba smbclient snap-pac
vapoursynth
Optional For : btrfs-progs cifs-utils fastfetch git gstreamer gtest gtk2 gupnp i2c-tools imath
iproute2 ki18n ldb lensfun libcaca libevent libftdi libimobiledevice libnewt
libplist libxml2 libxslt nfs-utils nftables openconnect pcsclite plasma-firewall
qbittorrent rsync talloc tdb tevent usbutils util-linux-libs xfsprogs zbar
Conflicts With : None
Replaces : python3
Installed Size : 75.26 MiB
Packager : Felix Yan <felixonmars@archlinux.org>
Build Date : Wed 05 Apr 2023 11:52:25 AM
Install Date : Sat 25 Jan 2025 05:11:18 PM
Install Reason : Explicitly installed
Install Script : No
Validated By : Signature
Edit:
[ricklinux@rick-ms7c37 ~]$ yay
:: Synchronizing package databases...
endeavouros is up to date
core is up to date
extra 7.5 MiB 12.2 MiB/s 00:01 [---------------------------------------------------------------------------------------] 100%
multilib is up to date
:: Searching AUR for updates...
:: Searching databases for updates...
-> Flagged Out Of Date AUR Packages: libpamac-aur
:: 1 package to upgrade/install.
1 core/python 3.11.3-1 -> 3.13.1-1
==> Packages to exclude: (eg: "1 2 3", "1-3", "^4" or repo name)
-> Excluding packages may cause partial upgrades and break systems
==>
1 Like
xircon
January 25, 2025, 10:16pm
8
I know, it was just to show the problems it would cause.
Downgrade and try to run a python based program - it will fall flat on it’s arse:
ranger 22:19:20
Traceback (most recent call last):
File "/usr/bin/ranger", line 36, in <module>
import ranger # NOQA pylint: disable=import-self,wrong-import-position
^^^^^^^^^^^^^
ModuleNotFoundError: No module named 'ranger'
Upgrading again.
1 Like
Thing is, yes, downgrading would work, BUT, the fact is some packages require a specific version of Python, like python311, rather than just python. And if a user has such packages, it can indeed break parts of the system, and of course, those specific packages.
This happened with Blender several months back. Blender closes when I add a Fluid Domain - #17 by ddnn
Well i just wrote i didn’t know that downgrading would do that because that’s what you posted.
1 Like
But the user has a specific package that needs a specific version.
Edit: I would have no idea what the user has on their system. They just asked … i answered. Whether it would break something i have no idea. I don’t know all there is to know nor do i pretend to.
1 Like
andrewb
January 25, 2025, 10:41pm
12
There are some Arch Core packages which are needed by a great number of other packages. When they get updated, piles of other updates come with them, and some AUR immediate breakages or near future updates.
In this class are python, icu, and openssl/libssl. Probably a couple others. Usually downgrades on these are risky to system stability.
1 Like
If you choose this route, use a static release distro like Debian, Fedora, etc. for the guest.
xircon
January 25, 2025, 10:48pm
14
1 Like
ringo
January 25, 2025, 10:53pm
15
Which python package you need 3.11? Python311 is flagged in aur…
But which package is needed why.needee this path
I’m trying to install a python package which uses numpy 1.24, but 1.24 is incompatible with python versions 3.12 and above.
I only need to run it in a virtual environment, I need to keep 3.13 on the system too. I should have made the more clear in the OP. Sorry for the confusion
I can create a virtual environment using 3.11 once it’s on my machine, but it needs to be installed in the right place for venv or virtualenv to recognise it’s there.
Pyenv installs it, but in the wrong place.
The AUR version will install it in the right place, but seems a risk, given the comments.
I just assumed, given the need for testing python applications against different versions, there’d be some standard way of doing it that didn’t involve playing roulette with various third party repositories…
What exactly did you try with pyenv? What does pyenv versions show?
The virtual environment is not the problem. The problem is getting the older version of python on the machine in the first place.
But thanks for taking the time to answer anyway.
ringo
January 25, 2025, 11:08pm
19
A python script? Or a python module?
pyenv install 3.11
pyenv versions correctly shows both system and 3.11
But there doesn’t seem to be a way of switching to the 3.11 environment using pyenv without messing around with the bashrc, which seems crazy.
I don’t understand why pyenv needs me to change the whole console environment. That seems massively overkill just to run a virtual environment, not to mention it defeats the whole point of a virtual environment (which is to run something without making major changes to your system)
