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dpctl.tensor.from_dlpack returns numpy.ndarray #1917

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@antonwolfy

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@antonwolfy

Documentation of dpctl.tensor.from_dlpack clearly states to return usm_ndarray array, but it will result into numpy.ndarray for an input object passed as numpy array:

import numpy, dpctl, dpctl.tensor as dpt

dpctl.__version__
# Out: '0.19.0dev0+280.g4a94ef9c25'

numpy.__version__
# Out: '2.1.3'

x = numpy.arange(10)
b = dpt.from_dlpack(x)
type(b)
# Out: numpy.ndarray

# setting `device` to a value will change the behavior:
b = dpt.from_dlpack(x, device='cpu')
type(b)
# Out: dpctl.tensor._usmarray.usm_ndarray

b = dpt.from_dlpack(x, device='gpu')
type(b)
# Out: dpctl.tensor._usmarray.usm_ndarray

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