How to install Python3.12 within POP!_OS Flatpak VSCodium and change its python interpreter version to Python3.12?

Problem & TLDR

Hello! I recently switched from Windows to POP!_OS. I am not too familiar with Linux and Python but want to learn it.

I am having trouble with changing Flatpak VSCodium's Python interpreter version. Flatpak VSCodium's default python version is python 3.11.7 64-bit which I have not manually installed into my POP!_OS linux distribution system nor do I see it anywhere in my home directory. Python3.10 is installed by default when I installed POP!_OS. I installed Python3.12 to POP!_OS with virtualvenv however I still cannot change Flatpak VSCodium's Python interpreter version from its default Python3.11 to my installed Python3.12 even with a virtual environment folder. Flatpak may be the root cause of the issue however I am not sure. How may I resolve this issue?

I just want to install and use the latest Python version and program with tkinter.

How I installed:

First I installed Python3.12 by downloading deadsnakes with this POP!_OS default terminal command line sudo add-apt-repository ppa:deadsnakes/nightly -y. I accidentally installed the nightly version of Python3.12. However I did follow the steps to install Python3.12 successfully to my POP!_OS System with this link: https://www.linuxcapable.com/install-python-3-12-on-ubuntu-linux/#Install-PIP-with-Python-312-on-Ubuntu-2204-or-2004.

Next I installed pip via the command line sudo apt install python3-pip.

After that, I installed VSCodium by clicking install within POP!_SHOP. I installed the Python extension when for VSCodium as well.

I made a parent folder called vscodium_workspace under my user folder. I made a child folder that stores python files for VSCodium called pythontest.

I followed the instructions from this website for Python3.12 (https://tellor.io/blog/how-to-install-python-3-9-and-venv-on-ubuntu/) to set up a virtual environment within my vscodium_workspace folder adjacent to pythontest called vsenv. vsenv has Python 3.12 installed.

What I have tried:

I have identified the python versions that I have from my POP!_OS default terminal (Python3.10 && Python3.12) and VSCodium (Python3.11) and where those python versions are.

I have tried setting a virtual environment with Python3.12 installed and restarting VSCodium. However I still cannot find Python3.12 as a python interpreter even though I have it installed. VSCodium defaults to Python3.11.

I get an output error in VSCodium every time I try to switch the python interpreter. It seems as if VSCodium cannot recognize Python3.12.

VSCodium Output:

2023-12-31 16:26:13.756 [warning] [Error: Command failed: /run/user/1000/doc/b6fda2f6/python3.12 -I /home/zhen/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/get_output_via_markers.py /home/zhen/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/interpreterInfo.pyCould not find platform independent libraries <prefix>Could not find platform dependent libraries <exec_prefix>Python path configuration:  PYTHONHOME = (not set)  PYTHONPATH = (not set)  program name = '/run/user/1000/doc/b6fda2f6/python3.12'  isolated = 1  environment = 0  user site = 0  safe_path = 1  import site = 1  is in build tree = 0  stdlib dir = '/usr/lib/python3.12'  sys._base_executable = '/run/user/1000/doc/b6fda2f6/python3.12'  sys.base_prefix = '/usr'  sys.base_exec_prefix = '/usr'  sys.platlibdir = 'lib'  sys.executable = '/run/user/1000/doc/b6fda2f6/python3.12'  sys.prefix = '/usr'  sys.exec_prefix = '/usr'  sys.path = ['/usr/lib/python312.zip','/usr/lib/python3.12','/usr/lib/python3.12/lib-dynload',  ]Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encodingPython runtime state: core initializedModuleNotFoundError: No module named 'encodings'Current thread 0x00007a67f433a040 (most recent call first):<no Python frame>    at ChildProcess.exithandler (node:child_process:430:12)    at ChildProcess.emit (node:events:513:28)    at maybeClose (node:internal/child_process:1091:16)    at ChildProcess._handle.onexit (node:internal/child_process:302:5)] {  code: 1,  killed: false,  signal: null,  cmd: '/run/user/1000/doc/b6fda2f6/python3.12 -I /home/zhen/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/get_output_via_markers.py /home/zhen/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/interpreterInfo.py'}2023-12-31 16:26:13.760 [info] > /run/user/1000/doc/b6fda2f6/python3.12 ~/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/get_output_via_markers.py ~/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/interpreterInfo.py2023-12-31 16:26:13.796 [error] [Error: Command failed: /run/user/1000/doc/b6fda2f6/python3.12 /home/zhen/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/get_output_via_markers.py /home/zhen/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/interpreterInfo.pyCould not find platform independent libraries <prefix>Could not find platform dependent libraries <exec_prefix>Python path configuration:  PYTHONHOME = (not set)  PYTHONPATH = (not set)  program name = '/run/user/1000/doc/b6fda2f6/python3.12'  isolated = 0  environment = 1  user site = 1  safe_path = 0  import site = 1  is in build tree = 0  stdlib dir = '/usr/lib/python3.12'  sys._base_executable = '/run/user/1000/doc/b6fda2f6/python3.12'  sys.base_prefix = '/usr'  sys.base_exec_prefix = '/usr'  sys.platlibdir = 'lib'  sys.executable = '/run/user/1000/doc/b6fda2f6/python3.12'  sys.prefix = '/usr'  sys.exec_prefix = '/usr'  sys.path = ['/usr/lib/python312.zip','/usr/lib/python3.12','/usr/lib/python3.12/lib-dynload',  ]Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encodingPython runtime state: core initializedModuleNotFoundError: No module named 'encodings'Current thread 0x00007012d7637040 (most recent call first):<no Python frame>    at ChildProcess.exithandler (node:child_process:430:12)    at ChildProcess.emit (node:events:513:28)    at maybeClose (node:internal/child_process:1091:16)    at Socket.<anonymous> (node:internal/child_process:449:11)    at Socket.emit (node:events:513:28)    at Pipe.<anonymous> (node:net:322:12)] {  code: 1,  killed: false,  signal: null,  cmd: '/run/user/1000/doc/b6fda2f6/python3.12 /home/zhen/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/get_output_via_markers.py /home/zhen/.var/app/com.vscodium.codium/data/codium/extensions/ms-python.python-2023.20.0-universal/pythonFiles/interpreterInfo.py'}2023-12-31 16:26:13.798 [error] Unable to start Jedi language server as a valid interpreter is not selected

I have tried restarting my POP!_OS System and sudo apt update.

I have tried reinstalling POP!_OS.

I found out that Flatpak VSCodium is ran inside a container so that it has limited access to the rest of my system: https://github.com/flathub/com.vscodium.codium#host-shell and is sandboxed https://docs.flatpak.org/en/latest/sandbox-permissions.html.

So I ask ChatGPT for help but I could not find much of an answer beside finding the Flatpak VSCodium ID.

zhen@pop-os:~/vscodium_workspace$ flatpack listTraceback (most recent call last):  File "/usr/lib/command-not-found", line 28, in <module>    from CommandNotFound import CommandNotFound  File "/usr/lib/python3/dist-packages/CommandNotFound/CommandNotFound.py", line 19, in <module>    from CommandNotFound.db.db import SqliteDatabase  File "/usr/lib/python3/dist-packages/CommandNotFound/db/db.py", line 5, in <module>    import apt_pkgModuleNotFoundError: No module named 'apt_pkg'zhen@pop-os:~/vscodium_workspace$ cd /zhen@pop-os:/$ flatpak listName        Application ID               Version      Branch      InstallationDiscord     com.discordapp.Discord       0.0.39       stable      userVSCodium    com.vscodium.codium          1.85.1.23348 stable      userFreedeskto… org.freedesktop.Platform     23.08.9      23.08       userMesa        …desktop.Platform.GL.default 23.3.1       23.08       userMesa (Extr……desktop.Platform.GL.default 23.3.1       23.08-extra usernvidia-545……latform.GL.nvidia-545-29-06              1.4         userIntel       …esktop.Platform.VAAPI.Intel              23.08       useropenh264    …eedesktop.Platform.openh264 2.1.0        2.2.0       userFreedeskto… org.freedesktop.Sdk          23.08.9      23.08       userPop Gtk th… org.gtk.Gtk3theme.Pop-dark                3.22        userzhen@pop-os:/$ flatpak info com.vscodium.codiumVSCodium - Code editing. Redefined. Telemetry less.          ID: com.vscodium.codium         Ref: app/com.vscodium.codium/x86_64/stable        Arch: x86_64      Branch: stable     Version: 1.85.1.23348     License: MIT      Origin: flathub  Collection: org.flathub.StableInstallation: user   Installed: 342.6 MB     Runtime: org.freedesktop.Sdk/x86_64/23.08         Sdk: org.freedesktop.Sdk/x86_64/23.08      Commit: b05e67034a507910ca4ace4e03e00550abd09aa59de143facb2a8418c505bc5c      Parent: c74719ca5d569d7befd8c731f49eba22f39b3a73837730cd7d8bbe15a1aef5e2     Subject: :tada: Update Codium (a0c44587)        Date: 2023-12-25 19:24:30 +0000

If you have any ideas how to solve my problem, it would be greatly appreciated. Happy New Year!