what does numpy ndarray shape do?

Question

I have a simple question about the .shape function, which confused me a lot.

a = np.array([1, 2, 3])   # Create a rank 1 array
print(type(a))            # P         


        

Answer 1

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