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Usm ndrray array protocol must raise#1964

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oleksandr-pavlyk merged 4 commits intomasterfrom
usm_ndrray-array-protocol-must-raise
Jan 15, 2025
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Usm ndrray array protocol must raise#1964
oleksandr-pavlyk merged 4 commits intomasterfrom
usm_ndrray-array-protocol-must-raise

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@oleksandr-pavlyk oleksandr-pavlyk commented Jan 13, 2025

Implement usm_ndarray.__array__ that raises TypeError to disallow implicit conversion of usm_ndarray to numpy.ndarray with dtype=object.

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github-actions bot commented Jan 13, 2025 •
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Deleted rendered PR docs from intelpython.github.com/dpctl, latest should be updated shortly. 🤞

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github-actions bot commented Jan 13, 2025

Array API standard conformance tests for dpctl=0.19.0dev0=py310h93fe807_434 ran successfully.
Passed: 894
Failed: 2
Skipped: 118

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coveralls commented Jan 13, 2025 •
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Coverage Status

coverage: 87.683% (+0.002%) from 87.681%
when pulling 8393a75 on usm_ndrray-array-protocol-must-raise
into 0f3536b on master.

@oleksandr-pavlyk oleksandr-pavlyk mentioned this pull request Jan 13, 2025
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Array API standard conformance tests for dpctl=0.19.0dev0=py310h93fe807_435 ran successfully.
Passed: 895
Failed: 1
Skipped: 118

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ndgrigorian commented Jan 14, 2025

Should we define copy and dtype parameters?

NumPy claims it will raise warnings otherwise, but of course, this is just here to raise an error—not sure if it will be a problem or not.

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oleksandr-pavlyk commented Jan 14, 2025

@ndgrigorian Could you please cite where sych claim is made? I looked at https://numpy.org/doc/stable/reference/generated/numpy.asarray.html and could not find it

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oleksandr-pavlyk commented Jan 14, 2025

Should we define copy and dtype parameters?

If you mean in the test, than we could, but it should not make a difference.

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ndgrigorian commented Jan 14, 2025 •
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@ndgrigorian Could you please cite where sych claim is made? I looked at https://numpy.org/doc/stable/reference/generated/numpy.asarray.html and could not find it

https://numpy.org/doc/2.1/user/basics.interoperability.html#dunder-array-interface
It is mentioned here

The signature of the method should be __array__(self, dtype=None, copy=None). If a passed dtype isn’t None and different than the object’s data type, a casting should happen to a specified type. If copy is None, a copy should be made only if dtype argument enforces it. For copy=True, a copy should always be made, where copy=False should raise an exception if a copy is needed.

If a class implements the old signature __array__(self), for np.array(a) a warning will be raised saying that dtype and copy arguments are missing.

@oleksandr-pavlyk oleksandr-pavlyk force-pushed the usm_ndrray-array-protocol-must-raise branch from 8571abc to f27d38f Compare January 14, 2025 11:29
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oleksandr-pavlyk commented Jan 14, 2025

I have changed __array__ from being a property to being a method with the signature NumPy expects. Thank you for catching this error @ndgrigorian

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Array API standard conformance tests for dpctl=0.19.0dev0=py310h93fe807_435 ran successfully.
Passed: 894
Failed: 2
Skipped: 118

antonwolfy
antonwolfy reviewed Jan 14, 2025
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Array API standard conformance tests for dpctl=0.19.0dev0=py310h93fe807_436 ran successfully.
Passed: 895
Failed: 1
Skipped: 118

@oleksandr-pavlyk
Implement usm_ndarray.__arrray__ method
81db5e5 
The property raises TypeError informing user that
implicit conversions from usm_ndarray to numpy.ndarray
are not permitted.

Explicit conversion using `dpctl.tensor.asnumpy` is
advised.

Disallowing implicit conversion prevents `np.asarray(usm_ar)`
from creating an array of 0D usm_ndarray instances, because
using it is very costly due to multitude of short-array transfers
from GPU to host.
@oleksandr-pavlyk
Add test that np.asarray(usm_ar) raises TypeError
d34bad9
@oleksandr-pavlyk
Record addition of __array__ method change in changelog
b6e3afe
@oleksandr-pavlyk
Make copy argument of __array__ method keyword-only
8393a75
@oleksandr-pavlyk oleksandr-pavlyk force-pushed the usm_ndrray-array-protocol-must-raise branch from a9385af to 8393a75 Compare January 14, 2025 16:04
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Array API standard conformance tests for dpctl=0.19.0dev0=py310h93fe807_440 ran successfully.
Passed: 894
Failed: 2
Skipped: 118

ndgrigorian
ndgrigorian approved these changes Jan 15, 2025
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LGTM!

@oleksandr-pavlyk oleksandr-pavlyk merged commit 6f02ec3 into master Jan 15, 2025
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@oleksandr-pavlyk oleksandr-pavlyk deleted the usm_ndrray-array-protocol-must-raise branch January 15, 2025 02:09
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