Python Virtual Environment

There is more than one way to skin the cat:

• venv
• virtulaenv
• pyenv with pyenv-virtualenv - see How pyenv decides on a python version.

Install pyenv+pyenv-virtualenv on MacOS

Install pyenv:

brew update
brew install pyenv
echo 'eval "$(pyenv init --path)"' >> ~/.zprofile
echo 'eval "$(pyenv init -)"' >> ~/.zshrc

Install pyenv-virtualenv:

brew install pyenv-virtualenv
echo 'eval eval "$(pyenv virtualenv-init -)"' >> ~/.zshrc

Create a Virtual Environment

• create .python-version;
• pyenv uses python version from .python-version;
• pyenv-virtualenv creates and uses python virtual environment named after .python-version.

Virtual Environment Maintenance

To see the current dependencies as a table:

pip3 list

To freeze:

pip3 freeze > requirements.txt