When I first tried to learn Python last year, the frustration of being a first-timer dealing with the Python 2 vs. Python 3 split very nearly turned me off of the language altogether. While I loved the language itself from first sight, Virtualenv was the tool that finally made Python a joy to <i>use</i>, rather than just a joy to write. This is a very good move.<p>Here's the link to PEP 405:<p><a href="http://www.python.org/dev/peps/pep-0405/" rel="nofollow">http://www.python.org/dev/peps/pep-0405/</a>