The python3 symlink is not meant to be handled by alternatives.
** Changed in: python3-defaults (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/2015243
Title:
py3versions doesn't follow symlinks (like realpath)
Status in python3-defaults package in Ubuntu:
Invalid
Bug description:
In case if we have more than one python version and manage them by
update-alternatives, the path to the python binary looks like:
root@devvm-14-143:~# ls -la /usr/bin/python3
lrwxrwxrwx 1 root root 25 Apr 4 08:11 /usr/bin/python3 ->
/etc/alternatives/python3
root@devvm-14-143:~# ls -la /etc/alternatives/python3
lrwxrwxrwx 1 root root 18 Apr 4 08:11 /etc/alternatives/python3 ->
/usr/bin/python3.8
So even we use the correct default version of python3 (like in Focal
it is python3.8) py3version will fail
root@devvm-14-143:~# py3versions -d
py3versions: the symlink /usr/bin/python3 does not point to the python3
default version. It must be reset to point to python3.8
This caused due to os.readlink doesn't follow multiply symlinks, so I
suggest to use Path from pathlib.
I have attached patch with suggested changes.
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