How to ndarray matrix output as a string

Title how to ndarray matrix output as a string

Randomly generate a 3X3 matrix, how to convert it to a string output?

import  numpy as np
a=np.random.randint(1,9,size=9).reshape((3,3))
print(a.__str__())

Print matrix

[[3 4 8]
 [5 8 4]
 [4 8 3]]

In this case, you can call ndarray method comes with complete
command line input

a.__str__()

Print results

'[[7 3 2]\n [3 8 3]\n [7 2 1]]'