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On 2/16/14 9:22 AM, Tim Chase wrote: > 3) you meant to write "(10, 'apple')" rather than 0. With my original > example code, a 0-probability shouldn't ever show up in the sampling, > where it looks like it might when using this sample code. In my > particular use case, I can limit/ensure that 0-probability items never > appear in the list, filtering them upon loading. Terry didn't state this explicitly, but he restructured your data to have cumulative probabilities. You had: data = ( ("apple", 20), ("orange", 50), ("grape", 30), ) He turned it into: data = [ (0, 'apple'), (0+20, 'orange'), (0+20+50, 'grape'), ] Each number is the cumulative probability up to but not including the item. -- Ned Batchelder, http://nedbatchelder.com

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