[Numpy-discussion] Count the occurrence of a certain integer in a list of integers

Alan G Isaac aisaac@american....
Tue Aug 7 08:11:34 CDT 2007


On Tue, 07 Aug 2007, Nils Wagner apparently wrote:
> I have a list of integer numbers. The entries can vary between 0 and 19. 
> How can I count the occurrence of any number. Consider 
>  >>> data
> [9, 6, 9, 6, 7, 9, 9, 10, 7, 9, 9, 6, 7, 9, 8, 8, 11, 9, 6, 7, 10, 9, 7, 9, 7, 8, 9, 8, 7, 9] 
> Is there a better way than using, e.g. 
>>>> shape(where(array(data)==10))[1] 
> 2


You did not say why data.count(10) is unsatisfactory ...

Cheers,
Alan Isaac






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