Get the frequency of the elementsΒΆ

Get the frequency of the elements in a list.
import collections

L = [10, 10, 10, 10, 20, 20, 20, 20, 40, 40, 50, 50, 30]
print("Original List : ", L)

ctr = collections.Counter(L)
print("Frequency of the elements in the List : ", ctr)

Output:

Frequency of the elements in the List: \
  Counter({10: 4, 20: 4, 40: 2, 50: 2, 30: 1})