python: what's the difference between pythonbrew and virtualenv?

Question

I am new to python and I am planning to learn django. I had a bit of experience with ruby (not rails) and I am familiar with RVM however I don\'t understand the

Answer 1

"pythonbrew is a program to automate the building and installation 
 of Python in the users $HOME."

By contrast, virtualenv provides an isolated environment for developing a project - it keeps all of the libraries for that project in one place, and it makes it much easier to relocate (and so deploy) the project.