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gh-102755: Add PyErr_DisplayException(exc) by iritkatriel · Pull Request #102756 · python/cpython · GitHub
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gh-102755: Add PyErr_DisplayException(exc)#102756

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iritkatriel merged 5 commits into
python:mainfrom
iritkatriel:DisplayException
Mar 16, 2023
Merged

gh-102755: Add PyErr_DisplayException(exc)#102756
iritkatriel merged 5 commits into
python:mainfrom
iritkatriel:DisplayException

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iritkatriel commented Mar 16, 2023
edited by bedevere-bot
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PyErr_Display is not documented, but it is mentioned in the stable abi file:

Doc/data/stable_abi.dat:function,PyErr_Display,3.2,,

I'm not sure what this means for PyErr_DisplayException.

iritkatriel requested a review from a team as a code owner March 16, 2023 15:33

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It looks to me as if PyErr_Display is some sort of internal debugging function.
Is it used anywhere?

Does git blame tell you anything about why it was added to the stable ABI?

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It looks to me as if PyErr_Display is some sort of internal debugging function.

It's what prints traceback when an uncaught exception occurs in the repl or in a script, (it's what the default sys.excepthook uses) so I'd hardly call it internal. It is the standard way of producing a standard formatted exception from C.

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality Hide comment

Nice cleanup!

Comment thread Doc/c-api/exceptions.rst Outdated Show resolved Hide resolved
Comment thread Python/sysmodule.c
/*[clinic end generated code: output=18d99fdda21b6b5e input=ecf606fa826f19d9]*/
{
PyErr_Display(exctype, value, traceback);
PyErr_Display(NULL, value, traceback);

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So this will hit the case where PyErr_Display() stuffs the given traceback onto the exception if the latter doesn't already have one? (Else why not use PyErr_DisplayException(), right?)

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Exactly. This is sys.excepthook() which anyone can call so we need to deprecate the case where traceback != value.__traceback__ before we can use PyErr_DisplayException here. (And eventually go through some kind of migration exercise for excepthook's signature, but let's survive the __exit__ discussion first).

iritkatriel added the 🔨 test-with-refleak-buildbots Test PR w/ refleak buildbots; report in status section label Mar 16, 2023

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🤖 New build scheduled with the buildbot fleet by @iritkatriel for commit ab84a68 🤖

If you want to schedule another build, you need to add the 🔨 test-with-refleak-buildbots label again.

bedevere-bot removed the 🔨 test-with-refleak-buildbots Test PR w/ refleak buildbots; report in status section label Mar 16, 2023

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All good

iritkatriel merged commit 3f9285a into python:main Mar 16, 2023
carljm added a commit to carljm/cpython that referenced this pull request Mar 17, 2023
* main: (34 commits) pythongh-102701: Fix overflow in dictobject.c (pythonGH-102750) pythonGH-78530: add support for generators in `asyncio.wait` (python#102761) Increase stack reserve size for Windows debug builds to avoid test crashes (pythonGH-102764) pythongh-102755: Add PyErr_DisplayException(exc) (python#102756) Fix outdated note about 'int' rounding or truncating (python#102736) pythongh-102192: Replace PyErr_Fetch/Restore etc by more efficient alternatives (python#102760) pythongh-99726: Improves correctness of stat results for Windows, and uses faster API when available (pythonGH-102149) pythongh-102192: remove redundant exception fields from ssl module socket (python#102466) pythongh-102192: Replace PyErr_Fetch/Restore etc by more efficient alternatives (python#102743) pythongh-102737: Un-ignore ceval.c in the CI globals check (pythongh-102745) pythonGH-102748: remove legacy support for generator based coroutines from `asyncio.iscoroutine` (python#102749) pythongh-102721: Improve coverage of `_collections_abc._CallableGenericAlias` (python#102722) pythonGH-102653: Make recipe docstring show the correct distribution (python#102742) Add comments to `{typing,_collections_abc}._type_repr` about each other (python#102752) pythongh-102594: PyErr_SetObject adds note to exception raised on normalization error (python#102675) pythongh-94440: Fix issue of ProcessPoolExecutor shutdown hanging (python#94468) pythonGH-100112: avoid using iterable coroutines in asyncio internally (python#100128) pythongh-102690: Use Edge as fallback in webbrowser instead of IE (python#102691) pythongh-102660: Fix Refleaks in import.c (python#102744) pythongh-102738: remove from cases generator the code related to register instructions (python#102739) ...
Comment thread Python/pylifecycle.c Show resolved Hide resolved
iritkatriel deleted the DisplayException branch March 19, 2023 11:50
Fidget-Spinner pushed a commit to Fidget-Spinner/cpython that referenced this pull request Mar 27, 2023
warsaw pushed a commit to warsaw/cpython that referenced this pull request Apr 11, 2023
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Add PyErr_DisplayException(exc) as replacement for PyErr_Display(typ, exc, tb)

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