memory leak in PyTree

[Eugene Leitl]

I've bought the wonderful Programming Python (2nd ed.) ORA book by Mark
Lutz (thanks Mark!) yesterday and right now I'm playing with the generic
tree object PyTree (pp.  1020-1032). I'm using Python 2.1b2 under Linux
2.2.

When I hit the button generating a 20 node random tree for a few 100
times, I notice a monotonous decrease in available memory (as reported by
top). When I terminate the program after it ate about 50 MBytes of memory,
it takes a long while to shut down, I can watch the widgets vanishing from
the canvass taking half a minute, or so.

Is this a "feature" of TkInter, or of the tree code? (I want to use
similiar code serverside using Medusa/Bobo, so it better not be leaky).

And, btw, does anybody have code that lets me create trees other than
binary?

TIA,

-- Eugene