frequency count or number of occurences of a number in an array

[John Machin]

On Mar 12, 10:29 pm, Bernard <bernard.ch... at gmail.com> wrote:
> Hey Larry,
>
> that one is fairly easy:
>
> >>> from array import array
> >>> array('i', [1, 2, 3, 4, 5, 1, 2])
> >>> def count(x, arr):
>
>         cpt = 0 # declare a counter variable
>         for el in arr: # for each element in the array
>                 if el == x: # when it is equal to the 'x' value
>                         cpt+=1 # increment the counter variable by one
>         return cpt # return the counter after the loop>>> count(1,a)
>
> 2
>

Hey Bernard, you have just laboriously reinvented the count method:

>>> from array import array
>>> a = array('i', [1, 2, 3, 4, 5, 1, 2])
>>> a.count(1)
2
>>>

which Larry has already said doesn't do the job -- the job is to
create a histogram!!