Re: best cumulative sum

bonono@xxxxxxxxx wrote:

>> def ireduce(op, iterable, *init):
>>     iterable = chain(init, iterable)
>>     accu = iterable.next()
>>     yield accu
>>     for item in iterable:
>>         accu = op(accu, item)
>>         yield accu

> I believe there is only one initializer in reduce.

Throw in a

if len(init) > 1: raise TypeError

for increased similarity to reduce().

> Also it is possible to not provide it.

Try it.

Peter

PS: Did I mention that I prefer for-loops over reduce() most of the time?


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