virtualenvwrapper

1. 安装virtualenv
sudo pip install virtualenv
2. 安装virtualenvwrapper
sudo pip install virtualenvwrapper

默认会将virtualenvwrapper安装到/usr/local/bin目录下,需要在用户的.bsharc文件中增加如下配置:

1.  
   # 1. Create a directory to hold the virtual environments.
2.  
   # (mkdir $HOME/.virtualenvs).
3.  
   # 2. Add a line like "export WORKON_HOME=$HOME/.virtualenvs"
4.  
   # to your .bashrc.
5.  
   # 3. Add a line like "source /path/to/this/file/virtualenvwrapper.sh"
6.  
   # to your .bashrc.
7.  
   # 4. Run: source ~/.bashrc
8.  
   # 5. Run: workon
9.  
   # 6. A list of environments, empty, is printed.
10.  
    # 7. Run: mkvirtualenv temp
11.  
    # 8. Run: workon
12.  
    # 9. This time, the "temp" environment is included.
13.  
    # 10. Run: workon temp
14.  
    # 11. The virtual environment is activated.

根据步骤，当运行source ./.bashrc报错:

1.  
   /usr/bin/python: No module named virtualenvwrapper
2.  
   virtualenvwrapper.sh: There was a problem running the initialization hooks.
3.  
   If Python could not import the module virtualenvwrapper.hook_loader,
4.  
   check that virtualenvwrapper has been installed for
5.  
   VIRTUALENVWRAPPER_PYTHON=/usr/bin/python and that PATH is
6.  
   set properly.

错误原因：Ubuntu安装了2.7和3.x两个版本的python,在安装时使用的是sudo pip3 install virtualenvwrapper
在我运行的时候默认使用的是python2.x,但在python2.x中不存在对应的模块。(virtualenvwrapper.sh文件内容如下:)：

1.  
   # Locate the global Python where virtualenvwrapper is installed.
2.  
   if [ "$VIRTUALENVWRAPPER_PYTHON" = "" ] then
3.  
   VIRTUALENVWRAPPER_PYTHON="$(command which python)"
4.  
   fi

当不存在VIRTUALENVWRAPPER_PYTHON环境时,会默认选择使用which python(我这里默认是python2),

所以需要增加此环境变量：

VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3