Detect number of dimensions of numpy array (not shape)

Question

Getting the shape of two different numpy arrays returns tuples

a.shape
Out[131]: (3,)

A.shape
Out[132]: (3, 3)

Based on the tuples, one is a one-dimensional array (number of dimensions = 1), the other is 2d. How can I detect number of dimensions similar to how type(A) will tell me one of them is a numpy.ndarray? should I just use len(a.shape)?

len(a.shape) is fine. a.ndim also. I doubt if it makes much difference. — hpaulj
– hpaulj, Commented Jan 16, 2021 at 21:47

black · Accepted Answer · 2021-01-16 21:16:10Z

1

You should use numpy.ndarray.ndim. So

a.ndim # gives 1

and

A.ndim # gives 2

edited Jan 16, 2021 at 21:16

answered Jan 16, 2021 at 21:14

black

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develarist Over a year ago

AttributeError: 'numpy.ndarray' object has no attribute 'dims'

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