Setting Python Version 3 on the Path

Question

I have the following:

joesan@joesan-InfinityBook-S-14-v5:~/Projects/Private/ml-projects/ml-data-preparation-sandbox$ sudo update-alternatives --config python
update-alternatives: warning: alternative /usr/bin/python2.7 (part of link group python) doesn't exist; removing from list of alternatives
There are 3 choices for the alternative python (providing /usr/bin/python).

  Selection    Path                Priority   Status
------------------------------------------------------------
  0            /usr/bin/python3.7   4         auto mode
* 1            /usr/bin/python3.7   4         manual mode
  2            /usr/bin/python3.8   2         manual mode
  3            /usr/bin/python3.9   3         manual mode

Press <enter> to keep the current choice[*], or type selection number: 
update-alternatives: warning: forcing reinstallation of alternative /usr/bin/python3.7 because link group python is broken
joesan@joesan-InfinityBook-S-14-v5:~/Projects/Private/ml-projects/ml-data-preparation-sandbox$ python3 --version
Python 3.8.10

How can I set Python3.7 as the default? Should I change the priority? To use Zeppelin 0.10.0 I guess I need Python 3.7.

EDIT: I installed pyenv and I have the following now:

joesan@joesan-InfinityBook-S-14-v5:~$ which python
/home/joesan/.pyenv/shims/python
joesan@joesan-InfinityBook-S-14-v5:~$ python --version
Python 3.7.8
joesan@joesan-InfinityBook-S-14-v5:~$ pyenv versions
  system
* 3.7.8 (set by /home/joesan/.pyenv/version)
joesan@joesan-InfinityBook-S-14-v5:~$ 

Answer 1

O, boy. Please consider using pyenv. You will be able to use as many python versions as you need.