$ pip install pew $ pew new myenv $ pew workon myenv $ pew in myenv pip list $ pew in myenv pip install package_name $ pew workon myenv $ pew rm myenv python import pew pew.new('myenv') pew.workon('myenv') pew.in_venv('myenv', 'pip install numpy') pew.in_venv('myenv', 'pip list')