shape()

import numpy as np
  
  
matrix= np.arange(1,9).reshape((3, 3))
  
# Original matrix
print(matrix)
  
# Number of rows and columns of the said matrix
print(matrix.shape)

[[1 2 3]
[4 5 6]
[7 8 9]]
(3,3)

import numpy as np
  
  
matrix= np.arange(10,15).reshape((3, 2))
  
# Original matrix:
print(matrix)
  
# Number of rows and columns of the said matrix
print(matrix.shape)

[[10 11]
[12 13]
[14 15]]
(3,2)