Things to review

http://docs.python.org/release/2.5.2/lib/lib.html
http://docs.python.org/dev/index.html
http://docs.python.org/dev/library/index.html

Sorting-howto: http://docs.python.org/dev/howto/sorting.html

http://cslibrary.stanford.edu/110/BinaryTrees.html

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