Python | Operator.countOf Last Updated : 30 Sep, 2019 Summarize Comments Improve Suggest changes Share Like Article Like Report 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 occurrences Returns: Count of number of occurrences of value. Example #1: Use Operator.countOf() to count the number of occurrences of given value in a list. Python3 1== # 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. Python3 1== # 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. Python3 1== # 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 Comment More infoAdvertise with us Next Article Python List count() method G garg_ak0109 Follow Improve Article Tags : Python Python-Operators Python-Built-in-functions Practice Tags : pythonpython-operators Similar Reads Python Operators In Python programming, Operators in general are used to perform operations on values and variables. These are standard symbols used for logical and arithmetic operations. In this article, we will look into different types of Python operators. OPERATORS: These are the special symbols. Eg- + , * , /, 6 min read Python Operators In Python programming, Operators in general are used to perform operations on values and variables. These are standard symbols used for logical and arithmetic operations. In this article, we will look into different types of Python operators. OPERATORS: These are the special symbols. Eg- + , * , /, 6 min read Python - Itertools.count() Python Itertools are a great way of creating complex iterators which helps in getting faster execution time and writing memory-efficient code. Itertools provide us with functions for creating infinite sequences and itertools.count() is one such function and it does exactly what it sounds like, it co 3 min read Python - Itertools.count() Python Itertools are a great way of creating complex iterators which helps in getting faster execution time and writing memory-efficient code. Itertools provide us with functions for creating infinite sequences and itertools.count() is one such function and it does exactly what it sounds like, it co 3 min read Python List count() method The count() method is used to find the number of times a specific element occurs in a list. It is very useful in scenarios where we need to perform frequency analysis on the data.Let's look at a basic example of the count() method.Pythona = [1, 2, 3, 1, 2, 1, 4] c = a.count(1) print(c)Output3 Explan 2 min read Python Arithmetic Operators Python operators are fundamental for performing mathematical calculations. Arithmetic operators are symbols used to perform mathematical operations on numerical values. Arithmetic operators include addition (+), subtraction (-), multiplication (*), division (/), and modulus (%). OperatorDescriptionS 4 min read Like