[Python-Dev] map(None, ...) in tutorial
Guido van Rossum
guido at python.org
Thu Aug 14 16:03:12 EDT 2003
> I've noticed this section in the tutorial:
>
> [...], we see that map(None, list1, list2) is a convenient way of
> turning a pair of lists into a list of pairs. For example:
>
> >>> map(None, seq, map(square, seq))
> [(0, 0), (1, 1), (2, 4), (3, 9), (4, 16), (5, 25), (6, 36), (7, 49)]
>
> I think the example be changed to use zip() instead, ie:
>
> >>> zip(seq, map(square, seq))
> [(0, 0), (1, 1), (2, 4), (3, 9), (4, 16), (5, 25), (6, 36), (7, 49)]
>
> Any objections?
But then it's no longer an example of the usefulness of map(None, x, y)?
(Well, map(None, ...) is never useful, so maybe that's okay...)
--Guido van Rossum (home page: http://www.python.org/~guido/)
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