报错：/usr/bin/python: Error while finding module specification for 'virtualenvwrapper.hook_loader'

原因：workon命令失效，Python的版本变更，先前是用的python3.6下安装的Python虚拟环境，相关的文件是在/Library/Frameworks/Python.framework/Versions/3.6/bin
解决方案1：重新在新的的python3.7环境下安装虚拟环境

$sudo pip3 install virtualenv virtualenvwrapper
$source .bashrc

解决方法2：将/Library/Frameworks/Python.framework/Versions/3.6/bin目录下的3个文件，拷贝到/usr/local/bin目录里

image.png

$cd /Library/Frameworks/Python.framework/Versions/3.6/bin
$cp virtualenv-clone virtualenvwrapper.sh virtualenvwrapper_lazy.sh /usr/local/bin