pip: Could not find an activated virtualenv (required)
问题 I am trying to instal virtualenv and/or virtualenvwrapper on a mac osx 10.8.3 I have been fighting with python for the last two days. Finally I was able to install python 2.7.4 using brew. Before I had virtualenv installed using easy_install. Then I tried to uninstall it, trying to get my computer in the same situation as the one of my colleagues. Maybe I uninstalled it with success, maybe not. I don't know how to test it. Now I am supposed to install virtualenv using - pip install virtualenv