add element in array inside dictionary code example

Example 1: append in dictionary with matrix values

import numpy as np

a = np.array([[4, 3], [2, 1]])
b = np.array([[1, 2], [3, 4]])
print(a@b)
# [[13 20]
#  [ 5  8]]

Example 2: append in dictionary with matrix values

print(np.dot(c,d))
# [[13 20]
#  [ 5  8]]