How do I sample randomly based on some probability(wightage)?

[Peter Otten]

Scott David Daniels wrote:

> raise ValueError('Samplng more than %d without replacement?' % (
> sum(1 for w in weights)))

That would be len(weights)

> There were two mistakes, both related to the definition of combined:
> (1) Combined only holds positive values, so testing in sum is silly.
 
but I think your first version was correct; I don't see were you remove the 
0-items from weights.

Peter