8000 gh-90751: memoryview now supports half-float by corona10 · Pull Request #96738 · python/cpython · GitHub
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gh-90751: memoryview now supports half-float #96738

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Merged
merged 9 commits into from
Sep 10, 2022
Merged

gh-90751: memoryview now supports half-float #96738

merged 9 commits into from
Sep 10, 2022

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corona10
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@corona10 corona10 commented Sep 10, 2022 •
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With patch


Python 3.12.0a0 (heads/gh-90751:ea5e2db2fa, Sep 10 2022, 15:41:30) [GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy as np
>>> a = np.array([0.0, -1.5], np.float16())
>>> list(memoryview(a))
[0.0, -1.5]
>>> memoryview(a.tobytes()).cast('e').tolist()
[0.0, -1.5]
>>>

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(.oss) ➜  cpython git:(gh-90751) ✗ ./python.exe -m test test_memoryview -R 3:3
Raised RLIMIT_NOFILE: 256 -> 1024
0:00:00 load avg: 1.24 Run tests sequentially
0:00:00 load avg: 1.24 [1/1] test_memoryview
beginning 6 repetitions
123456
......

== Tests result: SUCCESS ==

1 test OK.

Total duration: 660 ms
Tests result: SUCCESS

@corona10 corona10 changed the title gh-90751: memoryview supports half-float gh-90751: memoryview now supports half-float Sep 10, 2022
pitrou
pitrou requested changes Sep 10, 2022
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Thank you @corona10 .
Can you also add half-float to the generic tests in test_buffer.py?

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@corona10
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@pitrou

Can you also add half-float to the generic tests in test_buffer.py?

Hmm, would you like to recommend the proper place?

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pitrou commented Sep 10, 2022

@corona10 You can use this patch:
https://gist.github.com/pitrou/266079854bae1873d771aed14ca8fefa

but you'll see that it triggers some "RuntimeError: memoryview: internal error in richcompare" exceptions.

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corona10 commented Sep 10, 2022 •
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Thanks, I implemented unpack_cmp for half-float to pass your suggestion.
Now it passed all test suites :)


➜  cpython git:(gh-90751) ✗ ./python.exe -m test test_buffer -R 3:3
Raised RLIMIT_NOFILE: 256 -> 1024
0:00:00 load avg: 2.45 Run tests sequentially
0:00:00 load avg: 2.45 [1/1] test_buffer
beginning 6 repetitions
123456
......
test_buffer passed in 38.4 sec

== Tests result: SUCCESS ==

1 test OK.

Total duration: 38.4 sec
Tests result: SUCCESS

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pitrou commented Sep 10, 2022

With Numpy installed I get errors, will push a fix.

pitrou
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@corona10
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With Numpy installed I get errors, will push a fix.

Thanks

@pitrou pitrou requested a review from gpshead September 10, 2022 17:20
@corona10
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@pitrou
With numpy installation:


test_buffer leaked [1481, 1467, 1476] references, sum=4424
test_buffer failed (reference leak) in 53.9 sec

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corona10 commented Sep 10, 2022 •
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Forget about #96738 (comment)
The leakage is not related to this PR, the main branch is leaked also.
(With NumPy only)


test_buffer leaked [1392, 1380, 1375] references, sum=4147
test_buffer failed (reference leak) in 50.1 sec

== Tests result: FAILURE ==

1 test failed:
    test_buffer

Total duration: 50.1 sec
Tests result: FAILURE

LGTM

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pitrou commented Sep 10, 2022


The leakage is not related to this PR, the main branch is leaked also.
(With NumPy only)

Which Numpy version? I don't get this problem here.
8000

@pitrou pitrou merged commit 8d75a13 into python:main Sep 10, 2022
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pitrou commented Sep 10, 2022

Thanks a lot @corona10 !

@corona10 corona10 deleted the gh-90751 branch September 11, 2022 01:11
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Which Numpy version? I don't get this problem here.

@pitrou

Python 3.12.0a0 (heads/gh-90751:e8c1fed38f, Sep 10 2022, 17:46:55) [GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy as np
>>> np.__version__
'1.23.3'

@imaolo imaolo mentioned this pull request Dec 8, 2023
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@pitrou pitrou pitrou approved these changes

@mdickinson mdickinson mdickinson approved these changes

@gpshead gpshead Awaiting requested review from gpshead

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