ndim method to determine the dimension of NumPy array. For data science using Python in Anaconda - Jupyter
array1d = np.array([1, 2, 3, 4, 5, 6])
array2d = np.array([[1, 2, 3], [4, 5, 6]])
array3d = np.array([[[1, 2, 3], [4, 5, 6]], [[7, 8, 9], [10, 11, 12]]])
print(array1d.ndim)
print(array2d.ndim)
print(array3d.ndim)
Output:-
1
2
3