failed to get the Python codec of the filesystem encoding after Ubuntu upgrade

After upgrading to Ubuntu 23.04, my Python installation does not work anymore.

Running Poetry gives the following :

➜ ~ poetry Could not find platform independent libraries <prefix> Could not find platform dependent libraries <exec_prefix> Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>] Python path configuration: PYTHONHOME = (not set) PYTHONPATH = (not set) program name = '/home/guillaume/.local/share/pypoetry/venv/bin/python' isolated = 0 environment = 1 user site = 1 import site = 1 sys._base_executable = '/home/guillaume/.local/share/pypoetry/venv/bin/python' sys.base_prefix = '/usr' sys.base_exec_prefix = '/usr' sys.platlibdir = 'lib' sys.executable = '/home/guillaume/.local/share/pypoetry/venv/bin/python' sys.prefix = '/usr' sys.exec_prefix = '/usr' sys.path = [ '/usr/lib/python310.zip', '/usr/lib/python3.10', '/usr/lib/lib-dynload', ] Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding Python runtime state: core initialized ModuleNotFoundError: No module named 'encodings' Current thread 0x00007ff0fb4b1040 (most recent call first): <no Python frame> 

Running python itself does work :

➜ ~ python3 Python 3.11.2 (main, Mar 13 2023, 12:18:29) [GCC 12.2.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> 

I tried :

• Reinstalling Python
• unsetting PYTHONHOME and PYTHONPATH

How can I fix my Python setup ?