Python Program: Counting common elements in a list

Last update on April 02 2025 05:30:09 (UTC/GMT +8 hours)

2. Counter from List Elements

Write a Python program that creates a 'Counter' from a list of elements and print the most common elements along with their counts.

Sample Solution:

Code:

from collections import Counter

elements = [1, 2, 3, 4, 5, 11, 3, 3, 6, 7, 8, 9, 3, 10, 1]
element_counter = Counter(elements)

print("Most Common Elements:")
for element, count in element_counter.most_common():
    print(f"{element}: {count}")

Output:

Most Common Elements:
3: 4
1: 2
2: 1
4: 1
5: 1
11: 1
6: 1
7: 1
8: 1
9: 1
10: 1

In the exercise above, the "Counter" class is used to count the occurrences of each element in the given list. The "most_common()" method retrieves the most common elements along with their counts in descending order. After iterating through the most common elements, the program prints their counts.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to create a Counter from a list of integers and then print the two most frequent numbers along with their counts.
• Write a Python script to build a Counter from a list of strings and then output all elements with a frequency less than 3.
• Write a Python function that takes a list of mixed elements, generates a Counter, and prints the frequency distribution in descending order.
• Write a Python program to convert a list of words into a Counter and then display the total number of unique words.

Python Code Editor :

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