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Count occurrence in array python

Count occurrence in array python

arr = np.array( [1, 2, 3, 2, 1, 2])
occ = np.count_nonzero(arr==0)
print(occ)
0
occ = np.count_nonzero(arr==1)
print(occ)
2

4

How to find the number of times a number appears in python

dict((i, a.count(i)) for i in a)

3

Source: stackoverflow.com

Count occurrences of value in array python

>>> l = ["a","b","b"]
>>> l.count("a")

3

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