Count Frequencies in a List — Python | Dataford Interview Questions

nums = [1, 2, 3, 2, 1, 3, 2, 4, 5, 4] Write a Python program to count the frequency of each element in a list.

Asked in the round_1 stage. Implement the function below. Return a dictionary whose keys are string representations of the input values and whose values are their occurrence counts.

Function contract

Input: nums, a list of integers.
Output: a dictionary mapping each element's string representation to its frequency.

Constraints

0 <= len(nums) <= 10^5
Each element is an integer
Return keys as string representations of the input values

Function Signature

def count_frequencies(nums):

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