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Python – Fractional Frequency of elements in List
When it is required to find the fractional frequency of elements in a list, a dictionary comprehension, a simple iteration and the ‘Counter’ method is used.
Example
Below is a demonstration of the same −
from collections import Counter
my_list = [14, 15, 42, 60, 75, 50, 45, 55, 14, 60, 48, 65]
print("The list is :")
print(my_list)
my_num = {index : 0 for index in set(my_list)}
my_denominator = Counter(my_list)
my_result = []
for element in my_list:
my_num[element] += 1
my_result.append(str(my_num[element]) + '/' + str(my_denominator[element]))
print("The result is :")
print(my_result)Output
The list is : [14, 15, 42, 60, 75, 50, 45, 55, 14, 60, 48, 65] The result is : ['1/2', '1/1', '1/1', '1/2', '1/1', '1/1', '1/1', '1/1', '2/2', '2/2', '1/1', '1/1']
Explanation
The required packages are imported into the environment.
A list of integers is defined and is displayed on the console.
A dictionary comprehension is used to get unique elements from the list.
This is assigned to a variable.
A counter is created from the list.
An empty list is defined.
The list is iterated over, and the ‘/’ operator is used to add specific elements to the empty list using ‘append’ method.
This is the output that is displayed on the console.
Updated on: 08-Sep-2021
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