之前安装完成Python虚拟环境之后，过了一段时间就发现已经完全记不起怎么操作了，发现之前《Python虚拟环境配置》文章不能很好指导怎么操作，接下来补充说明以方便后续回顾使用。
之前文章有说明在virtualenvwrapper安装过程中需要配置.bashrc文件，如果登出了虚拟机上客户端操作系统，再一次登录之后，需要运行命令启动.bashrc文件，因为.bashrc是在登录时执行，因此运行下面的命令后可以使用virtualenvwrapper命令。
$ source ~/.bashrc
之后可以输入命令mkvirtualenv --help确认是否可用。
$ mkvirtualenv --help
Usage: mkvirtualenv [-a project_path] [-i package] [-r requirements_file] [virtualenv options] env_name
-a project_path
Provide a full path to a project directory to associate with
the new environment.
-i package
Install a package after the environment is created.
This option may be repeated.
-r requirements_file
Provide a pip requirements file to install a base set of packages
into the new environment.
virtualenv help:
Usage: virtualenv [OPTIONS] DEST_DIR
Options:
--version show program's version number and exit
-h, --help show this help message and exit
-v, --verbose Increase verbosity.
-q, --quiet Decrease verbosity.
-p PYTHON_EXE, --python=PYTHON_EXE
使用virtualenvwrapper创建虚拟机的运行环境，创建后就处于激活状态。
$ mkvirtualenv py3env
MacBook~$ mkvirtualenv --python=/usr/local/bin/python3 py3env
Running virtualenv with interpreter /usr/local/bin/python3
Using base prefix '/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6'
New python executable in /Users/MacBook/.virtualenvs/py3env/bin/python3.6
Also creating executable in /Users/MacBook/.virtualenvs/py3env/bin/python
Installing setuptools, pip, wheel...done.
virtualenvwrapper.user_scripts creating /Users/MacBook/.virtualenvs/py3env/bin/predeactivate
virtualenvwrapper.user_scripts creating /Users/MacBook/.virtualenvs/py3env/bin/postdeactivate
virtualenvwrapper.user_scripts creating /Users/MacBook/.virtualenvs/py3env/bin/preactivate
virtualenvwrapper.user_scripts creating /Users/MacBook/.virtualenvs/py3env/bin/postactivate
virtualenvwrapper.user_scripts creating /Users/MacBook/.virtualenvs/py3env/bin/get_env_details
(py3env) MacBook~$
用下面的命令对这一目录进行确认，看一下是否有py3env目录生成
MacBook~$ ls -la $HOME/.virtualenvs
drwxr-xr-x 7 MacBook staff 216 9 15 07:36 py3env
可以使用workon命令查看和进入已创建虚拟环境，deactivate退出。
MacBook~$ workon
myenv
py3env
MacBook~$ workon myenv
(myenv) MacBook~$
(myenv) MacBook~$ deactivate
MacBook~$
删除虚拟运行环境
MacBook~$ rmvirtualenv py3env
