how to count values in a numpy array code example

Example 1: np array value count

unique_elements, counts_elements = np.unique(a, return_counts=True)

Example 2: count values in numpy list python

>>> import numpy
>>> y = np.array([1, 2, 2, 2, 2, 0, 2, 3, 3, 3, 2, 2])

>>> numpy.count_nonzero(y == 1)
1
>>> numpy.count_nonzero(y == 2)
7
>>> numpy.count_nonzero(y == 3)
3