root@bt:~/Downloads/trinity/python# hg clone http://hg.python.org/cpython
/usr/bin/python: can't find '__main__.py' in '/usr/share/command-not-found'
root@bt:~/Downloads/trinity/python# python
Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56)
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
root@bt:~/Downloads/trinity/python#