Tree in Python
 

I need a tree class to hold some data which has a tree like internal structure.

I do not want to write a tree class myself. There is an example of a very simple tree class in some documentation/tutorial of function yield(). I am looking for a more sophisticated implementation. Open-source, of course. Any suggestion?

P.S. The python script I am wirting does not have any GUI. So please do not suggest use of Tree control.

A few things I pulled in in a google search:
http://www.brpreiss.com/books/opus7/programs/ - Just search for 'tree'.
http://aspn.activestate.com/ASPN/Coo.../Recipe/173217

Hope they help!