attribute
recarray.nbytes
Total bytes consumed by the elements of the array.
Does not include memory consumed by non-element attributes of the array object.
>>> x = np.zeros((3,5,2), dtype=np.complex128) >>> x.nbytes 480 >>> np.prod(x.shape) * x.itemsize 480
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https://docs.scipy.org/doc/numpy-1.17.0/reference/generated/numpy.recarray.nbytes.html