hwo to use the mean function in python code example

Example 1: how to calculate mean in python

import statistics

a = [1,2,3,4,5]

mean = statistics.mean(a) 
#Similar for other values such as variance, standard deviation

Example 2: mean python

import numpy as np
values=[1,10,100]
print(np.mean(values))
values=[1,10,100,np.nan]
print(np.nanmean(values))