Python | Operator.countOf (original) (raw)

Last Updated : 30 Sep, 2019

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 valuevalue : 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.

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