gh-129027: Raise DeprecationWarning for sys._clear_type_cache #129043

srinivasreddy · 2025-01-20T06:38:47Z

Issue: Raise DeprecationWarning for sys._clear_type_cache #129027

Lib/test/test_sys.py

tomasr8

sys._clear_type_cache is used in other tests as well which will now raise a DeprecationWarning. I think we should suppress the warnings in the relevant tests (or maybe switch to sys._clear_internal_caches()? though that might make backporting tests to 3.12 more difficult since the function was added in 3.13)

Python/sysmodule.c

tomasr8 · 2025-01-20T17:03:36Z

This will also require a news entry :)

srinivasreddy · 2025-01-21T06:22:17Z

@tomasr8 Addressed in c532328

Lib/test/test_sys.py

Lib/test/test_type_cache.py

Python/sysmodule.c

Misc/NEWS.d/next/Library/2025-01-21-11-48-19.gh-issue-129027.w0vxzZ.rst

Python/sysmodule.c

tomasr8

Would you also like to add a What's New entry as @picnixz suggested?

Misc/NEWS.d/next/Library/2025-01-21-11-48-19.gh-issue-129027.w0vxzZ.rst

srinivasreddy · 2025-01-30T09:30:24Z

@tomasr8 Thanks 👍🏾 . Please review again?

picnixz · 2025-02-01T20:53:43Z

The What's New is still missing (it's something that you need to add in Doc/whatsnew/3.14.rst I think). The NEWS (blurb) entry is only for the full changelog, but deprecation notices are also communicated there so that they have better visibility. You can put this change in the Pending Removal section (as we are now emitting a warning)

picnixz · 2025-02-07T10:11:35Z

I'll review it in a few minutes, but I have some comments on some wording. And I think we already mentioned to avoid force pushing, so please do so in the future. Avoid rebasing to merge upstream and prefer using the update button instead. Or if it becomes too messy, just create a new branch to be sure you don't trigger unnecessary review requests

picnixz

After commenting the files, I think you can create a wrapper around _clear_type_cache that suppresses its deprecation warning use instead of suppressing the warning around the entire test. If other deprecation warnings appear we want them to be printed.

Doc/deprecations/pending-removal-in-future.rst

Doc/whatsnew/3.14.rst

Python/sysmodule.c

Misc/NEWS.d/next/Library/2025-01-21-11-48-19.gh-issue-129027.w0vxzZ.rst

Lib/test/test_type_cache.py

picnixz · 2025-02-07T10:29:25Z

Lib/test/test_type_cache.py

@@ -15,11 +18,13 @@
 type_assign_specific_version_unsafe = _testinternalcapi.type_assign_specific_version_unsafe
 type_assign_version = _testcapi.type_assign_version
 type_modified = _testcapi.type_modified
+ignore_deprecation = warnings_helper.ignore_warnings(category=DeprecationWarning)


This should be a dummy decorator if _clear_type_cache is None.

Lib/test/test_sys.py

picnixz · 2025-02-07T10:30:18Z

Lib/test/test_cmd_line.py

    def test_python_dump_refs(self):
        code = 'import sys; sys._clear_type_cache()'
        rc, out, err = assert_python_ok('-c', code, PYTHONDUMPREFS='1')
        self.assertEqual(rc, 0)

    @unittest.skipUnless(sysconfig.get_config_var('Py_TRACE_REFS'), "Requires --with-trace-refs build option")
+    @warnings_helper.ignore_warnings(category=DeprecationWarning)


Can we use this one only when doing assert_python_ok?

picnixz · 2025-02-07T10:30:24Z

Lib/test/test_cmd_line.py

@@ -932,12 +932,14 @@ def test_python_asyncio_debug(self):
        self.assertIn(b'True', out)

    @unittest.skipUnless(sysconfig.get_config_var('Py_TRACE_REFS'), "Requires --with-trace-refs build option")
+    @warnings_helper.ignore_warnings(category=DeprecationWarning)


picnixz · 2025-02-07T10:31:12Z

Lib/test/test_type_cache.py

@@ -61,6 +66,7 @@ class C:
        self.assertNotEqual(type_get_version(C), 0)
        self.assertNotEqual(type_get_version(C), c_ver)

+    @ignore_deprecation


Can we only protect the _clear_type_cache call instead of the entire test?

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

…0vxzZ.rst Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

srinivasreddy · 2025-02-07T12:25:12Z

@picnixz Please review again.

Lib/test/test_cmd_line.py

picnixz · 2025-02-07T12:31:16Z

Lib/test/test_type_cache.py

+            with warnings.catch_warnings():
+                warnings.simplefilter("ignore", DeprecationWarning)


Maybe you can wrap clear_type_cache with a waraning filter:

def clear_type_cache(): with warnings.catch_warnings(): ... _clear_type_cache()

srinivasreddy · 2025-02-07T13:23:49Z

@picnixz Done.

tomasr8 · 2025-02-17T11:08:14Z

@srinivasreddy There are some conflicts with main now, could you fix them please?

srinivasreddy · 2025-02-17T11:36:12Z

@tomasr8 Done.

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Raise DeprecationWarning for sys._clear_type_cache #129027

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Update Doc/whatsnew/3.14.rst

3d2bca7

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

Update Doc/deprecations/pending-removal-in-future.rst

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Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

Update Misc/NEWS.d/next/Library/2025-01-21-11-48-19.gh-issue-129027.w…

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…0vxzZ.rst Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

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Merge branch 'main' into pythongh-129027

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Compilation of HACL fails under macOS Silicon for version 3.14 #130478

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Merge branch 'main' into pythongh-129027

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hugovk merged commit 8783cec into python:main Apr 25, 2025
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gh-129027: Raise DeprecationWarning for sys._clear_type_cache #129043

gh-129027: Raise DeprecationWarning for sys._clear_type_cache #129043

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srinivasreddy commented Feb 17, 2025

		with warnings.catch_warnings():
		warnings.simplefilter("ignore", DeprecationWarning)

gh-129027: Raise DeprecationWarning for sys._clear_type_cache #129043

gh-129027: Raise DeprecationWarning for sys._clear_type_cache #129043

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