I installed pip in a virtual environment. It installed without errors. Here\'s what I get when I run sudo pip install tweepy after activating the venv:
Requi
For installing the tweepy module just write pip install tweepy and it will work
Don't use sudo to call pip when you're in a virtualenv: the root user won't have the virtualenv activated so the package is installed globally, as you can see from the paths. Just run pip install tweepy.
Since you are using virtualenv you don't need to use sudo.