$ workon py33
(py33)
prologic@daisy
Wed Dec 18 00:19:30
~
$ python
Python 3.3.2 (default, Sep 29 2013, 14:48:28) 
[GCC 4.7.3] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from circuits import Component
>>> class App(Component):
...     def started(self, *args):
...             print("Hello World!")
... 
>>> App().run()
Hello World!
^C>>>