Useful pyenv commands:

brew install pyenv brew install pyenv-virtualenv

pyenv install --list pyenv versions pyenv global 3.8.5 pyenv local 3.8.5 pyenv global system pyenv local system pyenv which pip

To use an environment in the current shell.

pyenv shell 3.10.0

If the environment does not seem to be working then try the command below.

eval "$(pyenv init --path)"

To setup a pyenv virtual environment

pyenv virtualenv 3.8.5 onnx cd onnx pyenv local onnx

To setup a python virtual environment based on a pyenv environment:

pyenv shell 3.10.0 python -m venv .venv source .venv/bin/activate