average of array python code example

Example 1: find average of list python

list = [15, 18, 2, 36, 12, 78, 5, 6, 9]

# for older versions of python
average_method_one = sum(list) / len(list) 
# for python 2 convert len to a float to get float division
average_method_two = sum(list) / float(len(list))

# round answers using round() or ceil()
print(average_method_one)
print(average_method_two)

Example 2: np.array average row

>>> a = np.array([[1, 2], [3, 4]])
>>> np.mean(a)
2.5
>>> np.mean(a, axis=0)
array([2., 3.])
>>> np.mean(a, axis=1)
array([1.5, 3.5])

Example 3: numpy average

import numpy as np 
a = np.arange(6).reshape(3,2) 
average = np.average(a)

Example 4: python find average of list

# A function that finds an average of a list of numbers

numbers = [1,2,3,4,5,6,7,889,102390143]

def find_average(number_list):

    total = 0

    for number in number_list:
        total += number
    
    average = total / len(number_list)

    print("Your average is:", average)

find_average(numbers)