Pyenv and Pipenv

You will likely need to manage multiple versions of Python and different Python packages.

Virtualenv and Virtualenvwrapper

Previously you would use virtualenv to create new ‘environments’ (and specifying the Python version when creating the env). Install libraries into your environment. Use workon myenv to work on your environment.

Pyenv on Ubuntu

Install pyenv

curl -L https://raw.githubusercontent.com/pyenv/pyenv-installer/master/bin/pyenv-installer | bash

Add to ~/.bashrc

export PATH="~/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

Install versions

pyenv install 3.5.0
Downloading Python-3.5.0.tar.xz...
-> https://www.python.org/ftp/python/3.5.0/Python-3.5.0.tar.xz
Installing Python-3.5.0...

Check python versions

pyenv versions

Set the global python versions

pyenv global 3.5.0

pyenv versions

Note: You can use pyenv with virtualenvs:

pyenv virtualenv 3.7.0 myenv
pyenv virtualenvs  # list all virtualenv
pyenv activate myenv
pyenv deactivate
pyenv uninstall myenv  # uninstall virtualenv

Pipenv

Pipenv automatically creates and manages a virtualenv for your projects. You can add or remove packages from a Pipfile as you install/uninstall packages. You generate a Pipfile.lock, which produces deterministic builds. You don’t have to use pip and virtualenv separately.

Install

Mac with

brew install pipenv

Ubuntu

sudo apt install python3-pip python3-dev
pip3 install --user pipenv

Add pipenv to PATH

# Add pipenv (and other python scripts) to PATH
echo "PATH=$HOME/.local/bin:$PATH" >> ~/.bashrc

Autocomplete

Add to your .bashrc or .bash_profile for bash auto complete.

eval "$(pipenv --completion)"

Usage

pipenv install requests

pipenv lock