安装

pip install virtualenvwrapper

把以下内容加入 ~/.bashrc，~/.zshrc 等 Shell 初始化代码中：

export WORKON_HOME="~/.virtualenvs"
export VIRTUALENVWRAPPER_PYTHON="/usr/bin/python3"
source virtualenvwrapper.sh

1. source virtualenvwrapper_lazy.sh 也可以，只是不会自动补全了。
2. 这两个脚本默认会放到 /usr/local/bin/ 目录，或者 ~/.local/bin/ 目录，所以可以直接 source 加载。

简单使用

# 创建并进入虚拟环境
mkvirtualenv myproject

# 进入指定虚拟环境
workon myproject

# 退出虚拟环境
deactivate

# 列出虚拟环境
workon

# 删除虚拟环境
rmvirtualenv myproject

其他命令

virtualenvwrapper

virtualenvwrapper is a set of extensions to Ian Bicking's virtualenv
tool.  The extensions include wrappers for creating and deleting
virtual environments and otherwise managing your development workflow,
making it easier to work on more than one project at a time without
introducing conflicts in their dependencies.

For more information please refer to the documentation:

    http://virtualenvwrapper.readthedocs.org/en/latest/command_ref.html

Commands available:

  add2virtualenv: add directory to the import path

  allvirtualenv: run a command in all virtualenvs

  cdproject: change directory to the active project

  cdsitepackages: change to the site-packages directory

  cdvirtualenv: change to the $VIRTUAL_ENV directory

  cpvirtualenv: duplicate the named virtualenv to make a new one

  lssitepackages: list contents of the site-packages directory

  lsvirtualenv: list virtualenvs

  mkproject: create a new project directory and its associated virtualenv

  mktmpenv: create a temporary virtualenv

  mkvirtualenv: Create a new virtualenv in $WORKON_HOME

  rmvirtualenv: Remove a virtualenv

  setvirtualenvproject: associate a project directory with a virtualenv

  showvirtualenv: show details of a single virtualenv

  toggleglobalsitepackages: turn access to global site-packages on/off

  virtualenvwrapper: show this help message

  wipeenv: remove all packages installed in the current virtualenv

  workon: list or change working virtualenvs