I think the answer here is no.
There is a Treemap but it isn't in the python standard library.
http://pypi.python.org/pypi/treemap/
I think to those who don't like my answer, may think it's wrong due to a recent update. Please note this is for Python 2.6, not 2.7 or Python 3
Please add the correct answer if you still think it's wrong, or unhelpful, or at least give a reason why you think it's a bad answer.
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