How to switch python3 versions on MacOs [duplicate]

Question

I am using python version 3.10.2 but I want to downgrade to 3.9 because it is not compatible with a library in my project. How can I do this with terminal command?

So when I type python3 --version my version is 3.10.2 I want to downgrade it. IDE is pycharm

Answer 1

Install pyenv with Homebrew on macOS:

brew update
brew install pyenv

Define your vitual env variables:

echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile
echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(pyenv init -)"' >> ~/.bash_profile
source ~/.bash_profile
Restart your shell so the path changes take effect

exec "$SHELL"

Check the available python versions:

pyenv install --list

Install the required python version:

pyenv install 3.9

Set it as your global version:

pyenv global 3.9