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Re:Virtualenv to be part of Python 3.3 by drsintoma on Friday May 25, 2012 @04:34PM (#4025274)
virtualenv allows you to do that too (virtualenv -p [path to python]). You just need to download the interpreter yourself.
Re:Virtualenv to be part of Python 3.3 by epochwolf on Friday May 25, 2012 @05:16PM (#4025388)
rvm will download the requested version's source, apply any patches or flags you specify and then compile it. You don't have to do any work other than installing rvm. The rubies are also stored in ~/.rvm so your system doesn't get cluttered up.

Rvm also integrates into your shell so that when you cd into a project directory with a .rvmrc file, it will source the file and load the proper ruby and gemset for that project.

Virtualenv is much closer to ruby's bundler gem than rvm.

Re:Virtualenv to be part of Python 3.3 by sirn on Friday May 25, 2012 @09:09PM (#4026059)
It's much closer to rbenv rather than Bundler. zc.buildout is what is close to bundler.