The best way to Calculate Variance in Python

If you’ll want to calculate variance in Python, then you are able to do the next.

Choice 1 – Utilizing variance() from Statistics module

import statistics

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

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

Choice 2 – Utilizing var() from numpy module

import numpy as np

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

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

Choice 3 – Utilizing sum() and Record Comprehensions

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