attribute
dtype.ndim
Number of dimensions of the sub-array if this data type describes a sub-array, and 0
otherwise.
New in version 1.13.0.
>>> x = np.dtype(float) >>> x.ndim 0
>>> x = np.dtype((float, 8)) >>> x.ndim 1
>>> x = np.dtype(('i4', (3, 4))) >>> x.ndim 2
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https://docs.scipy.org/doc/numpy-1.17.0/reference/generated/numpy.dtype.ndim.html