Changing values on the edges of an array in NumPy

Question

I am to create an array using only NumPy tools. There it is:

[[2 2 2 2 2]
 [2 1 1 1 2]
 [2 1 1 1 2]
 [2 1 1 1 2]
 [2 2 2 2 2]]

That is my

Answer 1

import numpy as np

a = np.ones((5, 5))
b = np.pad(a[1:-1,1:-1], pad_width=((1, 1), (1, 1)), mode='constant', 
constant_values=2)
print b