Nice work! One minor thing I noticed... dictionary.has_key is deprecated, use the 'in' keyword instead: http://docs.python.org/release/3.1.5/whatsnew/3.0.html

Nice work! One minor thing I noticed... dictionary.has_key is deprecated, use the 'in' keyword instead: http://docs.python.org/release/3.1.5/whatsnew/3.0.html#builtins http://docs.python.org/release/3.1.5/whatsnew/3.0.html#built...