Moshe wrote: > I disagree: you agree that if you add a pad argument when the > lists are all the same size it doesn't matter (if you don't agree > with this, you don't agree with the PEP). Now, when there is only > one list, the lists are all the same size. QED. I would agree if we were talking about transpose(matrix, [pad]). Then: transpose([(1,2,3)]) -> [(1,), (2,), (3,)] and transpose([(1,), (2,), (3,)]) -> [(1,2,3)] That is, a 3X1 transposes to a 1X3 and vice versa. But zip doesn't take a matrix, it takes some number of sequences. Oh heck, I'll agree anyway. But I dread explaining why 1) it doesn't behave like map(None, [1,2,3]) 2) why zip(((1,2),(3,4))) doesn't yield [(1,3), (2,4)] but [((1,2),), ((3,4),)] instead! So: document zip as taking 2 or more sequences, and throw an exception if fed only one. - Gordon
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