huffman algorithm in python -

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hi!

could how fix problem in huffman algorthm (if put parts) internet site:

http://www.builderau.com.au/program/python/soa/huffman-coding-in-python/0,2000064084,339283616,00.htm

error:

 itemqueue =  [node(a, len(list(b))) a, b in groupby(sorted(input))] typeerror: 'builtin_function_or_method' object not iterable

thanks!

i think forgot declare input. should work fine otherwise.


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