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| Date | Sat, 8 Jun 2013 07:37:25 -0400 |
| Subject | Re: Idiomatic Python for incrementing pairs |
| From | Jason Swails <jason.swails@gmail.com> |
| To | Peter Otten <__peter__@web.de> |
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On Sat, Jun 8, 2013 at 2:47 AM, Peter Otten <__peter__@web.de> wrote: > > You can hide the complexity in a custom class: > > >>> class T(tuple): > ... def __add__(self, other): > ... return T((a+b) for a, b in zip(self, other)) > ... > >>> t = T((0, 0)) > >>> for pair in [(1, 10), (2, 20), (3, 30)]: > ... t += pair > ... > >>> t > (6, 60) > > (If you are already using numpy you can do the above with a numpy.array > instead of writing your own T.) > I do this frequently when I want data structures that behave like vectors but don't want to impose the numpy dependency on users. (Although I usually inherit from a mutable sequence so I can override __iadd__ and __isub__). It seemed overkill for the provided example, though... All the best, Jason
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Re: Idiomatic Python for incrementing pairs Jason Swails <jason.swails@gmail.com> - 2013-06-08 07:37 -0400
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