Python | Operator.countOf
Operator.countOf() is used for counting the number of occurrences of b in a. It counts the number of occurrences of value.
Syntax : Operator.countOf(freq = a, value = b)
Parameters :
freq : It can be list or any other data type which store value
value : It is value for which we have to count the number of occurrencesReturns: Count of number of occurrences of value.
Example #1: Use Operator.countOf() to count the number of occurrences of given value in a list.
# Python program showing# use of countOf() function# in a list from operator import * arr = [ 1, 2, 3, 3, 3 ]arr1 = [ 'a', 'b', 'c', 'b', 'd' ] print("Number of occurrence of b in arr1 =", countOf(arr1, "b"))print("Number of occurrence of e in arr1 =", countOf(arr1, "e"))print("Number of occurrence of 3 in arr =", countOf(arr, 3)) |
Output:
Number of occurrence of b in arr1 = 2 Number of occurrence of e in arr1 = 0 Number of occurrence of 3 in arr = 3
Example #2: Use Operator.countOf() to count the number of occurrences of given value in a dictionary.
# Python program showing# use of countOf() function# in a dictionary from operator import * d = {"score": 3, "score1": 1, "score2": 3, "score3": 1, "score4": 3} print("Number of occurrence of three in dict =",countOf(d.values(),3))print("Number of occurrence of one in dict =",countOf(d.values(),1))print("Number of occurrence of four in dict =",countOf(d.values(),4)) |
Output :
Number of occurrence of three in dict = 3 Number of occurrence of one in dict = 2 Number of occurrence of four in dict = 0
Example #3: Use Operator.countOf() to count the number of occurrences of given value in a tuples.
# Python program showing# use of countOf() function# in a tuples from operator import * tup = ( 1, 2, 3, 3, 3 )tup1 = ( 'a', 'b', 'c', 'b', 'd' ) print("Number of occurrence of b in tuple1 =",countOf(tup1,"b"))print("Number of occurrence of e in tuple1 =",countOf(tup1,"e"))print("Number of occurrence of 3 in tuple =",countOf(tup,3)) |
Output :
Number of occurrence of b in tuple1 = 2 Number of occurrence of e in tuple1 = 0 Number of occurrence of 3 in tuple = 3
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