As we get ever closer to the Python 3.3 beta, we need to ensure that all the functionality we'd like to see in 3.3 is ready for inclusion. One set of functionality is built-in virtual environments, as proposed by PEP 405 (Python Virtual Environments). There's a reference implementation [1], which seems to work pretty well; but the PEP has some open issues which someone on this list may be able to comment on. I'm particularly interested to hear what functionality is needed in the area of include files for C extensions. If you could look at the open issue on this [2] and give some feedback, that would be great. If you have the time to check out the reference implementation as a whole, then general comments on that would also be much appreciated - for example, it contains (though not part of PEP 405) packaging-related enhancements, e.g. code to handle extensible categories for setup.cfg (http://bugs.python.org/issue12393) and script generation (http://bugs.python.org/issue12394). Thanks and regards, Vinay Sajip [1] https://bitbucket.org/vinay.sajip/pythonv/ [2] http://www.python.org/dev/peps/pep-0405/#what-about-include-files