What is the use of bincount() method from numpy?

What is its purpose? I tried reading the official site but wasn’t able to understand.

Answer

bincount returns the count of values in each bin from 0 to the largest value in the array i.e.

np.bincount(my_list) == [count(i) for i in range(0, max(my_list))]
                     == [count(0), count(1), ..., count(max(my_list))]

e.g.

np.bincount([0, 1, 2, 3, 4, 4, 6])
>>>   array([1, 1, 1, 1, 2, 0, 1])

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Note:

• absent numbers (e.g. 5 above) return a count of 0
• a ValueError is raised if the list contains negative numbers or NaN