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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