[issue46510] Update Python2-style exception handling

[Irit Katriel]

Change by Irit Katriel :


--
keywords: +patch
pull_requests: +29058
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/30878

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[issue46510] Update Python2-style exception handling

[Irit Katriel]

New submission from Irit Katriel :

Following issue45711 the redundancy in exc_info is now explicit. This means 
that we can now safely update places that still use python2-style exception 
handling code, like:

exc_type, exc_value = sys.exc_info()[:2]
try:
response = dumps(
Fault(1, "%s:%s" % (exc_type, exc_value)),
encoding=self.encoding, allow_none=self.allow_none)
response = response.encode(self.encoding, 'xmlcharrefreplace')
finally:
# Break reference cycle
exc_type = exc_value = None

--
assignee: iritkatriel
components: Library (Lib)
messages: 411561
nosy: iritkatriel
priority: normal
severity: normal
status: open
title: Update Python2-style exception handling
type: enhancement
versions: Python 3.11

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[issue46496] idlelib/NEWS.txt for 3.11.0 and backports

[Terry J. Reedy]

Change by Terry J. Reedy :


--
pull_requests: +29057
pull_request: https://github.com/python/cpython/pull/30877

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[issue46496] idlelib/NEWS.txt for 3.11.0 and backports

[Terry J. Reedy]

Change by Terry J. Reedy :


--
pull_requests: +29056
pull_request: https://github.com/python/cpython/pull/30876

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[issue46496] idlelib/NEWS.txt for 3.11.0 and backports

[Terry J. Reedy]

Change by Terry J. Reedy :


--
keywords: +patch
pull_requests: +29055
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/30875

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[issue40280] Consider supporting emscripten/webassembly as a build target

[Christian Heimes]

Christian Heimes  added the comment:


New changeset 8464fbc42ecc9ce504faac499711dcdc6eedef16 by Christian Heimes in 
branch 'main':
bpo-40280: Skip subprocess-based tests on wasm32-emscripten (GH-30615)
https://github.com/python/cpython/commit/8464fbc42ecc9ce504faac499711dcdc6eedef16


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[issue41841] idlelib/NEWS.txt for 3.10.0 and backports

[Terry J. Reedy]

Terry J. Reedy  added the comment:


New changeset ce79b504a790d02c080449d31356d33a5aaf19dd by Miss Islington (bot) 
in branch '3.10':
bpo-41841: update idlelib News up to 3.10.0. (GH-30868) (GH-30870)
https://github.com/python/cpython/commit/ce79b504a790d02c080449d31356d33a5aaf19dd


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[issue41841] idlelib/NEWS.txt for 3.10.0 and backports

[Terry J. Reedy]

Terry J. Reedy  added the comment:


New changeset 98cabce59958914b59914abbffbfde7129d4c47f by Terry Jan Reedy in 
branch '3.9':
bpo-41841: update idlelib News up to 3.10.0 (GH-30871)
https://github.com/python/cpython/commit/98cabce59958914b59914abbffbfde7129d4c47f


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[issue46491] typing: allow Annotated in outermost scope

[miss-islington]

miss-islington  added the comment:


New changeset e1abffca45b60729c460e3e2ad50c8c1946cfd4e by Gregory Beauregard in 
branch 'main':
bpo-46491: Allow Annotated on outside of Final/ClassVar (GH-30864)
https://github.com/python/cpython/commit/e1abffca45b60729c460e3e2ad50c8c1946cfd4e


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[issue46491] typing: allow Annotated in outermost scope

[miss-islington]

Change by miss-islington :


--
pull_requests: +29054
pull_request: https://github.com/python/cpython/pull/30874

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[issue46491] typing: allow Annotated in outermost scope

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 4.0 -> 5.0
pull_requests: +29053
pull_request: https://github.com/python/cpython/pull/30873

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[issue46476] Not all memory allocated by _Py_Quicken() is released at Python exit

[Kumar Aditya]

Kumar Aditya  added the comment:

In the end I was able to restore the codeobjects before they were quickened so 
it works for both embedded and python command now. See the latest commits and 
it is also ready for review now.

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[issue44796] Add __parameters__ and __getitem__ in TypeVar and ParamSpec

[Jelle Zijlstra]

Jelle Zijlstra  added the comment:

The linked PR makes `T = TypeVar("T"); T[int]` work. That's not currently 
meaningful syntax to the type checker, but we may want it in the future for 
higher-kinded types. I would rather not make this change without a clear static 
typing use case in mind.

--
nosy: +Jelle Zijlstra

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[issue46509] Type-specialized Py_DECREF

[Dennis Sweeney]

Dennis Sweeney  added the comment:

This attempts to avoid the dispatch dance of

Py_DECREF(op) :: Py_TYPE(op)->tp_dealloc(op) :: Py_TYPE(op)->tp_free((PyObject 
*)op);

I suspect this earns the most speedup from floats, where freelist manipulation 
can be inlined. This might make a single-digit-int freelist more impactful.

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[issue46509] Type-specialized Py_DECREF

[Dennis Sweeney]

Change by Dennis Sweeney :


--
keywords: +patch
pull_requests: +29052
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/30872

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[issue46509] Type-specialized Py_DECREF

[Dennis Sweeney]

New submission from Dennis Sweeney :

GCC --enable-optimizations --with-lto on WSL:

Slower (7):
- json_dumps: 12.8 ms +- 0.2 ms -> 13.1 ms +- 0.3 ms: 1.02x slower
- meteor_contest: 106 ms +- 2 ms -> 109 ms +- 3 ms: 1.02x slower
- telco: 6.50 ms +- 0.17 ms -> 6.58 ms +- 0.18 ms: 1.01x slower
- fannkuch: 383 ms +- 5 ms -> 388 ms +- 8 ms: 1.01x slower
- regex_compile: 143 ms +- 2 ms -> 145 ms +- 4 ms: 1.01x slower
- mako: 11.1 ms +- 0.1 ms -> 11.2 ms +- 0.2 ms: 1.01x slower
- chameleon: 7.08 ms +- 0.07 ms -> 7.12 ms +- 0.10 ms: 1.01x slower

Faster (27):
- unpack_sequence: 45.9 ns +- 1.1 ns -> 41.6 ns +- 1.0 ns: 1.10x faster
- logging_silent: 108 ns +- 11 ns -> 101 ns +- 3 ns: 1.06x faster
- nbody: 95.6 ms +- 3.2 ms -> 90.2 ms +- 1.9 ms: 1.06x faster
- spectral_norm: 98.3 ms +- 2.3 ms -> 92.8 ms +- 1.6 ms: 1.06x faster
- regex_dna: 202 ms +- 3 ms -> 194 ms +- 3 ms: 1.04x faster
- scimark_fft: 342 ms +- 12 ms -> 331 ms +- 7 ms: 1.03x faster
- crypto_pyaes: 89.6 ms +- 1.7 ms -> 86.8 ms +- 1.1 ms: 1.03x faster
- json_loads: 27.4 us +- 0.9 us -> 26.5 us +- 1.3 us: 1.03x faster
- scimark_monte_carlo: 69.3 ms +- 1.5 ms -> 67.3 ms +- 1.2 ms: 1.03x faster
- pickle_list: 4.62 us +- 0.21 us -> 4.51 us +- 0.15 us: 1.02x faster
- scimark_sparse_mat_mult: 5.14 ms +- 0.21 ms -> 5.02 ms +- 0.18 ms: 1.02x 
faster
- xml_etree_parse: 161 ms +- 5 ms -> 157 ms +- 6 ms: 1.02x faster
- regex_effbot: 3.07 ms +- 0.05 ms -> 3.00 ms +- 0.07 ms: 1.02x faster
- deltablue: 4.36 ms +- 0.14 ms -> 4.27 ms +- 0.14 ms: 1.02x faster
- pickle_pure_python: 343 us +- 6 us -> 335 us +- 8 us: 1.02x faster
- sqlite_synth: 2.60 us +- 0.06 us -> 2.55 us +- 0.04 us: 1.02x faster
- xml_etree_iterparse: 110 ms +- 2 ms -> 108 ms +- 2 ms: 1.02x faster
- go: 146 ms +- 2 ms -> 143 ms +- 3 ms: 1.02x faster
- pathlib: 20.2 ms +- 0.5 ms -> 19.8 ms +- 0.3 ms: 1.02x faster
- scimark_sor: 117 ms +- 3 ms -> 115 ms +- 2 ms: 1.02x faster
- dulwich_log: 80.9 ms +- 2.0 ms -> 79.6 ms +- 1.7 ms: 1.02x faster
- nqueens: 84.4 ms +- 1.7 ms -> 83.1 ms +- 2.0 ms: 1.02x faster
- python_startup: 8.84 ms +- 0.07 ms -> 8.76 ms +- 0.07 ms: 1.01x faster
- 2to3: 269 ms +- 4 ms -> 266 ms +- 3 ms: 1.01x faster
- float: 77.0 ms +- 1.2 ms -> 76.5 ms +- 1.5 ms: 1.01x faster
- sympy_integrate: 22.7 ms +- 0.3 ms -> 22.5 ms +- 0.2 ms: 1.01x faster
- xml_etree_process: 55.7 ms +- 0.7 ms -> 55.4 ms +- 0.6 ms: 1.01x faster

Benchmark hidden because not significant (24): chaos, django_template, hexiom, 
logging_format, logging_simple, pickle, pickle_dict, pidigits, pyflate, 
python_startup_no_site, raytrace, regex_v8, richards, scimark_lu, 
sqlalchemy_declarative, sqlalchemy_imperative, sympy_expand, sympy_sum, 
sympy_str, tornado_http, unpickle, unpickle_list, unpickle_pure_python, 
xml_etree_generate

Geometric mean: 1.01x faster

--
components: Interpreter Core
messages: 411553
nosy: Dennis Sweeney
priority: normal
severity: normal
status: open
title: Type-specialized Py_DECREF
type: performance
versions: Python 3.11

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[issue41841] idlelib/NEWS.txt for 3.10.0 and backports

[Terry J. Reedy]

Change by Terry J. Reedy :


--
pull_requests: +29051
pull_request: https://github.com/python/cpython/pull/30871

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[issue41841] idlelib/NEWS.txt for 3.10.0 and backports

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 1.0 -> 2.0
pull_requests: +29050
pull_request: https://github.com/python/cpython/pull/30870

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[issue41841] idlelib/NEWS.txt for 3.10.0 and backports

[Terry J. Reedy]

Terry J. Reedy  added the comment:


New changeset 9d3c9788a6ccd4f2f53a147dd0026a316c396976 by Terry Jan Reedy in 
branch 'main':
bpo-41841: update idlelib News up to 3.10.0. (GH-30868)
https://github.com/python/cpython/commit/9d3c9788a6ccd4f2f53a147dd0026a316c396976


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[issue41841] idlelib/NEWS.txt for 3.10.0 and backports

[Terry J. Reedy]

Change by Terry J. Reedy :


--
superseder: IDLE subsection of What's New 3.11 -> idlelib/NEWS.txt for 3.11.0 
and backports

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[issue41841] idlelib/NEWS.txt for 3.10.0 and backports

[Terry J. Reedy]

Change by Terry J. Reedy :


--
pull_requests: +29049
pull_request: https://github.com/python/cpython/pull/30868

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[issue46503] assertion failure in Parser/string_parser.c

[Eric V. Smith]

Change by Eric V. Smith :


--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue46503] assertion failure in Parser/string_parser.c

[Eric V. Smith]

Eric V. Smith  added the comment:


New changeset 894e8c13484822458d53cc77c9265b7a88450a4b by Miss Islington (bot) 
in branch '3.10':
bpo-46503: Prevent an assert from firing when parsing some invalid \N sequences 
in f-strings. (GH-30865) (GH-30866)
https://github.com/python/cpython/commit/894e8c13484822458d53cc77c9265b7a88450a4b


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[issue46503] assertion failure in Parser/string_parser.c

[Eric V. Smith]

Eric V. Smith  added the comment:


New changeset c314e3e829943b186e1c894071f00c613433cfe5 by Miss Islington (bot) 
in branch '3.9':
bpo-46503: Prevent an assert from firing when parsing some invalid \N sequences 
in f-strings. (GH-30865) (30867)
https://github.com/python/cpython/commit/c314e3e829943b186e1c894071f00c613433cfe5


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[issue46503] assertion failure in Parser/string_parser.c

[miss-islington]

Change by miss-islington :


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[issue46503] assertion failure in Parser/string_parser.c

[Eric V. Smith]

Eric V. Smith  added the comment:


New changeset 0daf72194bd4e31de7f12020685bb39a14d6f45e by Eric V. Smith in 
branch 'main':
bpo-46503: Prevent an assert from firing when parsing some invalid \N sequences 
in f-strings. (GH-30865)
https://github.com/python/cpython/commit/0daf72194bd4e31de7f12020685bb39a14d6f45e


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[issue46503] assertion failure in Parser/string_parser.c

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 4.0 -> 5.0
pull_requests: +29047
pull_request: https://github.com/python/cpython/pull/30866

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[issue46503] assertion failure in Parser/string_parser.c

[Eric V. Smith]

Eric V. Smith  added the comment:

Note that f'\N ' (with a single space) isn't enough to trigger this behavior. 
It requires at least two characters after the '\N'. The first is when the 
invalid string is recognized, and it's the presence of the second character 
that triggers the failed assert.

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[issue44733] Feature request: maxtasksperchild for ProcessPoolExecutor

[Gregory P. Smith]

Gregory P. Smith  added the comment:

As this is a new feature, it would also be reasonable to have specifying 
max_tasks_per_child without explicitly specifying a mp_context default to a 
safe mp_context.

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[issue44733] Feature request: maxtasksperchild for ProcessPoolExecutor

[Gregory P. Smith]

Gregory P. Smith  added the comment:

from discussion on the other bug it looks like we should have a way to keep 
this; we just need to not allow it when the mp_context to be used is the 'fork' 
one.

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[issue46464] concurrent.futures.ProcessPoolExecutor can deadlock when tcmalloc is used

[Gregory P. Smith]

Gregory P. Smith  added the comment:

and similarly, the dynamic spawning could be kept when the mp_context is spawn 
(and possibly forkserver).

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[issue46503] assertion failure in Parser/string_parser.c

[Eric V. Smith]

Change by Eric V. Smith :


--
keywords: +patch
pull_requests: +29046
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/30865

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[issue46464] concurrent.futures.ProcessPoolExecutor can deadlock when tcmalloc is used

[Gregory P. Smith]

Gregory P. Smith  added the comment:

It sounds like we need to introspect the mp_context= passed to 
ProcessPoolExecutor (and it's default when None) to raise an error when 
max_tasks_per_child is incompatible with it.

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[issue44723] Codec name normalization breaks custom codecs

[Inada Naoki]

Change by Inada Naoki :


--
nosy: +methane

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[issue46464] concurrent.futures.ProcessPoolExecutor can deadlock when tcmalloc is used

[Inada Naoki]

Inada Naoki  added the comment:

> The only way to safely launch worker processes on demand is to spawn a worker 
> launcher process spawned prior to any thread creation that remains idle, with 
> a sole job of spawn new worker processes for us. That sounds complicated. 
> That'd be a feature. Lets go with the bugfix first.

fork is not the only way to launch worker process. We have spawn. And sapwn is 
the default for macOS since Python 3.8.

Simple reverting seems not good for macOS users, since they need to pay cost 
for both of pre-spawning and spawn.
Can't we just pre-spawn only when fork is used?

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[issue46504] Faster code for trial quotient in x_divrem

[Tim Peters]

Change by Tim Peters :


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status: open -> closed

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[issue46504] Faster code for trial quotient in x_divrem

[Tim Peters]

Tim Peters  added the comment:


New changeset 7c26472d09548905d8c158b26b6a2b12de6cdc32 by Tim Peters in branch 
'main':
bpo-46504: faster code for trial quotient in x_divrem() (GH-30856)
https://github.com/python/cpython/commit/7c26472d09548905d8c158b26b6a2b12de6cdc32


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[issue46406] optimize int division

[Tim Peters]

Tim Peters  added the comment:


New changeset 7c26472d09548905d8c158b26b6a2b12de6cdc32 by Tim Peters in branch 
'main':
bpo-46504: faster code for trial quotient in x_divrem() (GH-30856)
https://github.com/python/cpython/commit/7c26472d09548905d8c158b26b6a2b12de6cdc32


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[issue46508] codec name acceptance became way too lenient in 3.9

[Gregory P. Smith]

Gregory P. Smith  added the comment:

while figuring this issue out, it may also make sense to address 
https://bugs.python.org/issue44723 as well.

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[issue32958] socket module calls with long host names can fail with idna codec error

[Gregory P. Smith]

Gregory P. Smith  added the comment:

ablack: the basic auth username:password@ part of the string is not part of a 
hostname.  What code are you seeing that is trying to send that to a name 
resolver rather than stripping the obviously private info up through the @ sign?

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nosy: +gregory.p.smith

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[issue44723] Codec name normalization breaks custom codecs

[Gregory P. Smith]

Change by Gregory P. Smith :


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nosy: +gregory.p.smith

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[issue37751] In codecs, function 'normalizestring' should convert both spaces and hyphens to underscores.

[Gregory P. Smith]

Gregory P. Smith  added the comment:

note that Bodo's own followup issue about the breaking change for python-iconv 
was filed as https://bugs.python.org/issue44723

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[issue37751] In codecs, function 'normalizestring' should convert both spaces and hyphens to underscores.

[Gregory P. Smith]

Gregory P. Smith  added the comment:

(note: this might not be the true cause of that issue; though it sounds 
potentially related - I haven't investigated far enough yet)

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[issue37751] In codecs, function 'normalizestring' should convert both spaces and hyphens to underscores.

[Gregory P. Smith]

Gregory P. Smith  added the comment:

https://bugs.python.org/issue46508 filed to track fixing the acceptance and use 
of garbage codec values regression that this caused.

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[issue46508] codec name acceptance became way too lenient in 3.9

[Gregory P. Smith]

New submission from Gregory P. Smith :

in 3.8 this was not a valid codec name: "เ_เ_เ_iDnA"
in 3.9 it gets treated as idna and triggers the punycode decoder when passed to 
bytes.decode(codec).

Discovered by oss-fuzz.

_Likely_ a consequence of https://bugs.python.org/issue37751

The consequences of this change are that anyone can stuff heinous strings into 
codec names and get a non-LookupError behavior out of them. Anywhere codecs can 
be part of user input this has many interesting potential negative consequences.

<=3.8 gave `LookupError("unknown encoding: ...`

--
keywords: 3.9regression
messages: 411535
nosy: gregory.p.smith
priority: normal
severity: normal
stage: needs patch
status: open
title: codec name acceptance became way too lenient in 3.9
type: behavior
versions: Python 3.10, Python 3.11, Python 3.9

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[issue33205] GROWTH_RATE prevents dict shrinking

[Raymond Hettinger]

Raymond Hettinger  added the comment:

Should this have been "filled*3" rather than "used*3"?

The intent was to give a larger resize to dict that had a lot of dummy entries 
and a smaller resize to dicts without deletions.

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[issue26276] Inconsistent behaviour of PEP 3101 formatting between versions

[Irit Katriel]

Irit Katriel  added the comment:

Reproduced on 3.11.

--
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versions: +Python 3.10, Python 3.11, Python 3.9 -Python 3.4

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[issue22045] Python make issue

[Irit Katriel]

Change by Irit Katriel :


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status: open -> closed

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[issue46491] typing: allow Annotated in outermost scope

[Gregory Beauregard]

Change by Gregory Beauregard :


--
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pull_requests: +29045
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pull_request: https://github.com/python/cpython/pull/30864

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[issue13011] Frozen programs require the original build directory in order to run.

[Irit Katriel]

Irit Katriel  added the comment:

This seems very outdated, can we close it?

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status: open -> pending

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[issue11322] encoding package's normalize_encoding() function is too slow

[Gregory P. Smith]

Change by Gregory P. Smith :


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[issue46503] assertion failure in Parser/string_parser.c

[Eric V. Smith]

Eric V. Smith  added the comment:

This triggers the same problem:
f'\N  '
ast.literal_eval() isn't needed.

I think it's just the assert that's wrong, but I'm still checking.

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[issue43545] Use LOAD_GLOBAL to set __module__ in class def

[Irit Katriel]

Irit Katriel  added the comment:

Can you explain what the bug is with code to reproduce it?

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[issue40735] test_nntplib depends on unreliable external servers

[Irit Katriel]

Irit Katriel  added the comment:

Following discussion with Zach and Victor: This is probably an issue with the 
external servers these tests used. The fix would be to rewrite the tests so 
that they don't rely on external infrastructure.

--
nosy: +iritkatriel, vstinner, zach.ware
title: test_nntplib: sporadic failures, 
NetworkedNNTP_SSLTests.test_with_statement -> test_nntplib depends on 
unreliable external servers
type: behavior -> enhancement
versions: +Python 3.11

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[issue41209] Scripts Folder is Empty

[Irit Katriel]

Irit Katriel  added the comment:

3.8 is no longer maintained. Please create a new issue if you are having this 
problem with a current python version.

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stage:  -> resolved
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[issue38886] permissions too restrictive in zipfile.writestr

[Irit Katriel]

Irit Katriel  added the comment:

Closed issue23976 as duplicate of this.

--
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type: behavior -> enhancement
versions: +Python 3.11 -Python 3.8

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[issue32202] [ctypes] all long double tests fail on android-24-x86_64

[Irit Katriel]

Irit Katriel  added the comment:

3.7 is no longer being maintained. Please create a new issue if you are having 
this problem on a current version (>= 3.9)

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status: open -> closed

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[issue32203] [ctypes] test_struct_by_value fails on android-24-arm64

[Irit Katriel]

Irit Katriel  added the comment:

3.7 is no longer being maintained. Please create a new issue if you are having 
this problem on a current version (>= 3.9)

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stage: needs patch -> resolved
status: open -> closed

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[issue31357] Expose `worker_target` and `workitem_cls` as arugments to customize `ThreadPoolExecutor` behaviour

[Irit Katriel]

Change by Irit Katriel :


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[issue42982] Update suggested number of iterations for pbkdf2_hmac()

[April King]

April King  added the comment:

Django uses 390,000 iterations as of late 2021, as does the Python Cryptography 
project. We should be aligned with their recommendations, or at least a good 
deal closer than we are now.

390,000 actually makes it a conservative recommendation for key derivation, as 
that number of rounds takes ~133ms to compute on my M1 versus 36ms. Usually 
you're shooting for ~250ms.

Being off by ~50% is probably okay, being off by this much is considerably 
worse.

Anyways, I'd be happy to make such a PR if folks are amenable to it.

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[issue39064] ValueError in zipfile.ZipFile

[Irit Katriel]

Irit Katriel  added the comment:

It's easy enough to convert the exception type (see patch), but I don't know 
how to write a unit test for this.

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[issue39064] ValueError in zipfile.ZipFile

[Irit Katriel]

Change by Irit Katriel :


--
keywords: +patch
pull_requests: +29044
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/30863

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[issue46416] Direct invocation of `Lib/test/test_typing.py` fails

[Nikita Sobolev]

Nikita Sobolev  added the comment:

During this work some people have mentioned that they actually use
`'__main__'` for local debugging of tests.
I don't think that I am familiar enough with the existing workflow to make
any educated decision :)

пн, 24 янв. 2022 г. в 19:34, Christian Heimes :

>
> Christian Heimes  added the comment:
>
> I noticed that you have been looking into the __main__ block of test
> modules. Wouldn't it make more sense to just remove the __main__ and have
> all tests go through regrtest? Everybody should use
>
>./python -m regrtest test_typing
>
> or the Windows equivalent to run typing tests.
>
> --
> nosy: +christian.heimes
>
> ___
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>

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[issue46431] Trouble subclassing ExceptionGroup

[Irit Katriel]

Irit Katriel  added the comment:

Thank you Petr.

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[issue46431] Trouble subclassing ExceptionGroup

[Irit Katriel]

Irit Katriel  added the comment:


New changeset b18fd54f8c27e4b2aac222e75ac58aa85e5a7988 by Irit Katriel in 
branch 'main':
bpo-46431: Add example of subclassing ExceptionGroup. Document the message and 
exceptions attributes (GH-30852)
https://github.com/python/cpython/commit/b18fd54f8c27e4b2aac222e75ac58aa85e5a7988


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[issue46431] Trouble subclassing ExceptionGroup

[Irit Katriel]

Irit Katriel  added the comment:


New changeset 573b54515740ce51dcf2402038a9d953aa6c317f by Irit Katriel in 
branch 'main':
bpo-46431: improve error message on invalid calls to BaseExceptionGroup.__new__ 
(GH-30854)
https://github.com/python/cpython/commit/573b54515740ce51dcf2402038a9d953aa6c317f


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[issue46483] `pathlib.PurePath.__class_getitem__` does not return `GenericAlias`

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:

This issue is not related to the parser, so I am unmarking it.

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[issue29890] Constructor of ipaddress.IPv*Interface does not follow documentation

[Humbdrag]

Change by Humbdrag :


--
keywords: +patch
nosy: +humbdrag
nosy_count: 5.0 -> 6.0
pull_requests: +29043
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/30862

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[issue46507] enabling cProfile to profile code given as an argument "à la" timeit

[julien tayon]

Change by julien tayon :


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[issue46483] `pathlib.PurePath.__class_getitem__` does not return `GenericAlias`

[Popo Al]

Change by Popo Al :


--
components: +Parser, asyncio, email
nosy: +barry, lys.nikolaou, pablogsal, r.david.murray, yselivanov
type: behavior -> 
versions: +Python 3.10

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[issue46507] enabling cProfile to profile code given as an argument "à la" timeit

[julien tayon]

New submission from julien tayon :

well, you want to use
python3 -mcProfile -othis.prof 'oneliner in python to test something'

And weirdly enough this normally expected behaviour does not work.

It's because last argument is expected to be the path of the script name to 
profile.

But, it can be fixed easily with no downside

Since it is an expected behaviour and is minimal changing anything in 
documentation or news seems to superfluous

An exemple of « this is a standard de fait » is the fact that the awesome 
module of vstinner timeit does this already.


https://github.com/python/cpython/pull/30859

--
components: Library (Lib)
messages: 411517
nosy: jul2, vstinner
priority: normal
pull_requests: 29042
severity: normal
status: open
title: enabling cProfile to profile code given as an argument "à la" timeit
type: enhancement
versions: Python 3.10, Python 3.11, Python 3.7, Python 3.8, Python 3.9

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[issue46490] Add "follow_symlinks=False" support for "os.utime()" on Windows

[Eryk Sun]

Change by Eryk Sun :


--
dependencies: +[Windows] wrap CreateFile to support follow_symlinks

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[issue46506] [Windows] wrap CreateFile to support follow_symlinks

[Eryk Sun]

New submission from Eryk Sun :

Issue 46490 proposes to support follow_symlinks in os.utime() on Windows. 
Instead of duplicating the os.stat() implementation of follow_symlinks, I 
suggest factoring out a common _Py_CreateFile() function with two additional 
parameters: traverse (input) and pFileInfo (output).

The `traverse` parameter would indicate whether to traverse or open a 
name-surrogate reparse point. However, FILE_FLAG_OPEN_REPARSE_POINT should take 
precedence over `traverse` and open any type of reparse point.

The pFileInfo parameter would be an optional pointer to a struct that receives 
the file type (disk, char, pipe), file attributes, and reparse tag. Querying 
this information is required when `traverse` is false. There may as well be a 
way to return it.

Since Windows 7 hasn't been supported since 3.8, this is also an opportunity to 
switch to the newer CreateFile2() function [1], which is required in order to 
use new file flags added to the API such as FILE_FLAG_OPEN_REQUIRING_OPLOCK. 

---
[1] 
https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfile2

--
components: Extension Modules, Windows
messages: 411516
nosy: eryksun, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: [Windows] wrap CreateFile to support follow_symlinks
type: enhancement

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[issue46500] make timeit module accept files

[Arjun]

Arjun  added the comment:

I was modifying the try/except/finally/else code generation and wanted to run 
my own benchmarks.

It's cumbersome to edit them in a command to test different variations, 
especially when you have to indent.

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[issue35095] Implement pathlib.Path.append_bytes and pathlib.Path.append_text

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


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[issue35095] Implement pathlib.Path.append_bytes and pathlib.Path.append_text

[Nuno André]

Change by Nuno André :


--
nosy: +nuno
nosy_count: 3.0 -> 4.0
pull_requests: +29041
pull_request: https://github.com/python/cpython/pull/3811

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[issue40280] Consider supporting emscripten/webassembly as a build target

[Christian Heimes]

Christian Heimes  added the comment:


New changeset d5fd438b38248a0d2e91898475369361e34f74b7 by Christian Heimes in 
branch 'main':
bpo-40280: Get help() working and more (GH-30858)
https://github.com/python/cpython/commit/d5fd438b38248a0d2e91898475369361e34f74b7


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[issue46483] `pathlib.PurePath.__class_getitem__` does not return `GenericAlias`

[Guido van Rossum]

Change by Guido van Rossum :


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[issue40280] Consider supporting emscripten/webassembly as a build target

[Christian Heimes]

Change by Christian Heimes :


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pull_request: https://github.com/python/cpython/pull/30858

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[issue43333] utf8 in BytesGenerator

[R. David Murray]

R. David Murray  added the comment:

Yeah, I think we need a complete example here.

Note that in the general case there is no such thing as an RFC-valid email in 
unicode (which is what python strings are), though with utf8=True and an email 
involving only text you might get away with it.  I assume you've tried 
policy=policy.default.clone(utf=True) when creating the email?

It will probably help to encode the 'text' to utf8 and use message_from_bytes 
to read it, but that may not be your only problem.  It depends on exactly what 
is in the message and how the message gets recorded in your XML whether this is 
even going to work in the general case.  The xml conversion may have already 
lost information, but hopefully not.

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[issue46505] Simplify exception handling code in py_compile

[Irit Katriel]

Change by Irit Katriel :


--
components: +Library (Lib)
type:  -> enhancement
versions: +Python 3.11

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[issue39511] [subinterpreters] Per-interpreter singletons (None, True, False, etc.)

[Kuba Sunderland-Ober]

Kuba Sunderland-Ober  added the comment:

I'm looking very much forward to isolated subinterpreters and thus the 
per-subinterpreter GIL, as I've been keeping a private exploratory project 
where I had to make them work.

Here are my thoughts:

1. Any sort of reference count on heavily used objects cannot be shared between 
the threads, even if its value is otherwise ignored. I.e., a write-only shared 
refcount is already a no-no. The mere fact that it's being modified from 
different threads is a performance bottleneck, as the cacheline that holds the 
refcount has to be shuttled between cores. That's a bad thing and the penalty 
only becomes worse as the time marches on.

2. For platforms where the C language supports thread-local storage (TLS) at 
the declaration level, it's trivial to have "global static" immortal objects 
become thread-local static. This could be perhaps an escape to keep old code 
working to an extent, as opposed to immediately breaking. On such platforms, 
the `PyGet_Foo` API can be on equal footing with the legacy `Py_Foo` statics, 
i.e. both would do the same thing. That's how I've done it in my experiment. 
The obvious problem is that on platforms without compiler support for TLS, 
`Py_Foo` would be unavailable, and that's probably a no-go for an API that 
wouldn't be deprecated. For portability, everyone should be using `PyGet_Foo`, 
iff platforms without language-level TLS support are of interest (are they? 
what would they be?)

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[issue46505] Simplify exception handling code in py_compile

[Irit Katriel]

Change by Irit Katriel :


--
keywords: +patch
pull_requests: +29039
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/30857

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[issue46503] assertion failure in Parser/string_parser.c

[Eric V. Smith]

Eric V. Smith  added the comment:

I'll take a look.

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[issue46503] assertion failure in Parser/string_parser.c

[Eric V. Smith]

Change by Eric V. Smith :


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assignee: pablogsal -> eric.smith

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[issue46503] assertion failure in Parser/string_parser.c

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:

Adding Eric as this seems to be in the f-string parser.

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[issue46505] Simplify exception handling code in py_compile

[Irit Katriel]

New submission from Irit Katriel :

PyCompileError takes both type and value of the exception, which is no longer 
necessary. Fortunately neither its constructor signature nor its fields are 
documented so it can be simplified.

--
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severity: normal
status: open
title: Simplify exception handling code in py_compile

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[issue46503] assertion failure in Parser/string_parser.c

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


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[issue41682] [Windows] test_asyncio: Proactor test_sendfile_close_peer_in_the_middle_of_receiving failure

[Andrew Svetlov]

Andrew Svetlov  added the comment:

Guido, I can not confirm your suggestion but it seems correct to me.

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[issue34680] asyncio event_loop fails when accessed from multiple threads

[Irit Katriel]

Irit Katriel  added the comment:

I think the script does violate the rule: 

t = threading.Thread(target=do_loop, args=(loop,))

and then do_loop closes the loop that was created in the main thread.

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[issue46504] Faster code for trial quotient in x_divrem

[Tim Peters]

Change by Tim Peters :


--
assignee:  -> tim.peters
nosy: +gregory.p.smith, mark.dickinson

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[issue34680] asyncio event_loop fails when accessed from multiple threads

[Andrew Svetlov]

Andrew Svetlov  added the comment:

All asyncio loop methods except `loop.call_soon_threadsafe()` should be done 
from the same thread as been used for the loop creation.
Did you violate this rule?

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[issue46504] Faster code for trial quotient in x_divrem

[Tim Peters]

Change by Tim Peters :


--
keywords: +patch
pull_requests: +29037
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/30856

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[issue46406] optimize int division

[Tim Peters]

Change by Tim Peters :


--
pull_requests: +29038
pull_request: https://github.com/python/cpython/pull/30856

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[issue46504] Faster code for trial quotient in x_divrem

[Tim Peters]

Change by Tim Peters :


--
versions: +Python 3.11

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[issue46504] Faster code for trial quotient in x_divrem

[Tim Peters]

New submission from Tim Peters :

x_divrem1() was recently (bpo-46406) changed to generate faster code for 
division, essentially nudging optimizing compilers into recognizing that modern 
processors compute the quotient and remainder with a single machine instruction.

The same can be done for x_divrem(), although it's less valuable there because 
the HW division generally accounts for a much smaller percent of its total 
runtime.

Still, it does cut a multiply and subtract out of the loop, and makes the code 
more obvious (since it brings x_divrem1() and x_divrem() back into synch).

--
components: Interpreter Core
messages: 411505
nosy: tim.peters
priority: normal
severity: normal
stage: needs patch
status: open
title: Faster code for trial quotient in x_divrem
type: performance

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[issue34680] asyncio event_loop fails when accessed from multiple threads

[Irit Katriel]

Change by Irit Katriel :


--
title: asyncio event_loop close fails off main thread if signal handler 
registered -> asyncio event_loop fails when accessed from multiple threads

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[issue46503] assertion failure in Parser/string_parser.c

[Gregory P. Smith]

Change by Gregory P. Smith :


--
assignee:  -> pablogsal

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[issue34680] asyncio event_loop close fails off main thread if signal handler registered

[Irit Katriel]

Irit Katriel  added the comment:

The documentation should explicitly mention that an event loop should be 
accessed from only one thread (it hints at this by referring to "the loop of 
the current thread" but I don't see this stated clearly).

In the code, it would be good if multi-threaded access failed with a clearer 
error.

--
nosy: +iritkatriel
versions: +Python 3.10, Python 3.11, Python 3.9 -Python 3.6, Python 3.7

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[issue46503] assertion failure in Parser/string_parser.c

[Gregory P. Smith]

New submission from Gregory P. Smith :

```
>>> v = r"""f'\N  '"""
>>> import ast
>>> ast.literal_eval(v)
python: ../gpshead/Parser/string_parser.c:487: fstring_find_literal: Assertion 
`s == end || *s == '{' || *s == '}'' failed.
Aborted
```

this comes from oss-fuzz after enabling assert checks in its cpython builds. :)

https://oss-fuzz.com/testcase-detail/4805529363415040 & 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=43730 for those who have 
access.

--
components: Parser
messages: 411503
nosy: gregory.p.smith, lys.nikolaou, pablogsal
priority: high
severity: normal
stage: needs patch
status: open
title: assertion failure in Parser/string_parser.c
type: crash
versions: Python 3.11

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