The way to Calculate Variance in Python

If it is advisable to calculate variance in Python, then you are able to do the next.

Possibility 1 – Utilizing variance() from Statistics module

import statistics

record = [12,14,10,6,23,31]
print("Listing : " + str(record))

var = statistics.variance(record)
print("Variance: " + str(var))

Possibility 2 – Utilizing var() from numpy module

import numpy as np

arr = [12,43,24,17,32]

print("Array : ", arr)
print("Variance: ", np.var(arr))

Possibility 3 – Utilizing sum() and Listing Comprehensions

record = [12,43,24,17,32]
common = sum(record) / len(record)
var = sum((x-average)**2 for x in record) / len(record)
print(var)