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Counting occurrences of each item

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Counting occurrences of each item in Python

schedule Aug 12, 2023

Last updated

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Python

Counting occurrence of an item in a list

Consider the following list:


        
        
            
                
                
                    lists = [1,5,3,5,5]

To count the number of a value (5 in this case) in a list:


        
        
            
                
                
                    print(lists.count(5))
                
            
            3

Counting occurrence of each item in a list

We can use Counter within the Collections module to count the occurrences of each item in a sequence.

To count occurrences of each item in my_list:


        
        
            
                
                
                    from collections import Counter
my_list = ['a', 'b', 'b', 'c', 'c','c']
occurrences = Counter(my_list)
print(occurrences)
                
            
            Counter({'c': 3, 'b': 2, 'a': 1})

We can see that 'c' appears 3 times, 'b' appears 2 times and 'a' appears once in my_list.

Published by Arthur Yanagisawa

Edited by 0 others

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