Depending on what concrete use you have for binary trees, you may want to consider tuples. What's cool about them is that you get pattern matching on your tree for free.
>>> x = ((2,4),(5,6)) >>> y, _ = x >>> y (2, 4) >>> (_,y), _ = x >>> y 4 >>> Or you could code your own binary tree class subclassing tuple. ... just a thought. v. -- http://mail.python.org/mailman/listinfo/python-list
