Answers for "count every element occurrence python"

count number of occurrences of all elements in list python

import collections

a_list = ["a", "b", "a"]
occurrences = collections.Counter(a_list)
print(occurrences)

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