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Python: Frequency of the elements in a given list of lists

Python List: Exercise - 143 with Solution

Write a Python program to get the frequency of the elements in a given list of lists.

Sample Solution:

Python Code:

def count_elements_lists(nums):
    nums = [item for sublist in nums for item in sublist]
    dic_data = {}
    for num in nums:
        if num in dic_data.keys():
            dic_data[num] += 1
        else:
            key = num
            value = 1
            dic_data[key] = value
    return dic_data

nums = [
        [1,2,3,2],
        [4,5,6,2],
        [7,8,9,5],
       ]    
print("Original list of lists:")
print(nums)
print("\nFrequency of the elements in the said list of lists:")
print(count_elements_lists(nums))

Sample Output:

Original list of lists:
[[1, 2, 3, 2], [4, 5, 6, 2], [7, 8, 9, 5]]

Frequency of the elements in the said list of lists:
{1: 1, 2: 3, 3: 1, 4: 1, 5: 2, 6: 1, 7: 1, 8: 1, 9: 1}

Flowchart:

Flowchart: Frequency of the elements in a given list of lists.

Visualize Python code execution:

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Python Code Editor:

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Previous: Write a Python program to sum a specific column of a list in a given list of lists.
Next: Write a Python program to extract every first or specified element from a given two-dimensional list.

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Python: Tips of the Day

Big Number Readability:

you can separate zeros with underscore (_)

print(2_000_000)
print(2_000_000 +1)

Output:

2000000
2000001