Tips of Python virtual environment

virtualenvwrapper

virtualenvwrapper provides a set of commands which makes working with virtual environments much more pleasant. It also places all your virtual environments in one place.

pip install packages

$ sudo pip install virtualenv virtualenvwrapper

Edit the profile ~/.bashrc, add the following lines

...
...
# virtualenv and virtualenvwrapper
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3
source /usr/local/bin/virtualenvwrapper.sh

Apply the profile

$ source ~/.bashrc

Create a virtual environment

$ mkvirtualenv py3cv3 -p python3

py3cv3 is my project name, you can name it as whatever you like (and create as many Python virtual environments as you want).

-p specify the version of python

Quit virtualenv console

(env)$ deactivate

Remove a virtual environment

$ rmvirtualenv py3cv3

Other useful commands

// List all of enviroments
$ lsvirtualenv
or
$ workon

// Navigate into the directory of the currently activated virtual environment
$ workon your-env
$ cdvirtualenv

// Like the above, but directly into site-packages directory.
$ workon your-env
$ cdsitepackages

// Shows contents of site-packages directory.
$ workon your-env
$ lssitepackages