“The best things in life can not be experienced virtually.” ― Michael ONeill, Road Work: Images And Insights Of A Modern Day Explorer

You need this configuration in your .zshrc or .bashrc to to guarantee the correct functioning of pyenv

eval "$(pyenv init --path)"  
eval "$(pyenv init -)"  
export PATH=$HOME/.pyenv/shims/python:$PATH  
export PATH=$HOME/.pyenv/shims/:$PATH

See available python versioss to install

pyenv install --list

• Yo can filter this list:

  pyenv install --list | grep " 3\.[678]"
  ----------
  
  3.6.0
  3.6-dev
  3.6.1
  3.6.2
  3.6.3
  3.6.4
  3.6.5
  3.6.6
  3.6.7
  3.6.8
  3.7.0
  3.7-dev
  3.7.1
  3.7.2
  3.8-dev
  

Install new version python in pyenv

pyenv install -v 3.7.2

See available python versions intalled in my machine

pyenv versions

• The asterisk marks the version in use.

Deactivate pyenv shell

pyenv shell --unset

Use Local python version

pyenv local 3.8.12  

• This command create a local file named .python-version with the local version that you wanto to use.
• If you delete this file you use the global version of python again.

Use Global python version

pyenv global 3.8.12

• Set enviroment to use this python version in all folders of your machine.
• Except the folder that have configured a local version