Barney Gale [Mon, 13 Nov 2023 17:15:56 +0000 (17:15 +0000)]
GH-72904: Add `glob.translate()` function (#106703)
Add `glob.translate()` function that converts a pathname with shell wildcards to a regular expression. The regular expression is used by pathlib to implement `match()` and `glob()`.
This function differs from `fnmatch.translate()` in that wildcards do not match path separators by default, and that a `*` pattern segment matches precisely one path segment. When *recursive* is set to true, `**` pattern segments match any number of path segments, and `**` cannot appear outside its own segment.
In pathlib, this change speeds up directory walking (because `_make_child_relpath()` does less work), makes path objects smaller (they don't need a `_lines` slot), and removes the need for some gnarly code.
Co-authored-by: Jason R. Coombs <jaraco@jaraco.com> Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
Victor Stinner [Mon, 13 Nov 2023 16:14:56 +0000 (17:14 +0100)]
gh-111138: Add PyList_Extend() and PyList_Clear() functions (#111862)
* Split list_extend() into two sub-functions: list_extend_fast() and
list_extend_iter().
* list_inplace_concat() no longer has to call Py_DECREF() on the
list_extend() result, since list_extend() now returns an int.
In PyObject_GC_Del, in Py_DEBUG mode, when warning about GC objects that
were not properly untracked before starting destruction, take care to
untrack the object _before_ warning, to avoid triggering a GC run and
causing the problem the code tries to warn about. Also make sure to save and
restore any pending exceptions, which the warning would otherwise clobber or
trigger an assertion error on.
T. Wouters [Sat, 11 Nov 2023 23:56:27 +0000 (00:56 +0100)]
Fix undefined behaviour in datetime.time.fromisoformat() (#111982)
Fix undefined behaviour in datetime.time.fromisoformat() when parsing a string without a timezone. 'tzoffset' is not assigned to by parse_isoformat_time if it returns 0, but time_fromisoformat then passes tzoffset to another function, which is undefined behaviour (even if the function in question does not use the value).
Stephen Gildea [Sat, 11 Nov 2023 17:41:33 +0000 (09:41 -0800)]
gh-90890: New methods to access mailbox.Maildir message info and flags (#103905)
New methods to access mailbox.Maildir message info and flags:
get_info, set_info, get_flags, set_flags, add_flag, remove_flag.
These methods speed up accessing a message's info and/or flags and are
useful when it is not necessary to access the message's contents,
as when iterating over a Maildir to find messages with specific flags.
---------
* Add more str type checking
* modernize to f-strings instead of %
Co-authored-by: Gregory P. Smith <greg@krypto.org>
Sam Gross [Thu, 9 Nov 2023 23:37:11 +0000 (18:37 -0500)]
gh-111569: Fix critical sections test on WebAssembly (GH-111897)
This adds a macro `Py_CAN_START_THREADS` that corresponds to the Python
function `test.support.threading_helper.can_start_thread()`. WASI and
some Emscripten builds do not have a working pthread implementation.
This macro is used to guard the critical sections C API tests that
require a working threads implementation.
Victor Stinner [Thu, 9 Nov 2023 22:10:21 +0000 (23:10 +0100)]
gh-111881: Import _sha2 lazily in random (#111889)
The random module now imports the _sha2 module lazily in the
Random.seed() method for str, bytes and bytearray seeds. It also
imports lazily the warnings module in the _randbelow() method for
classes without getrandbits(). Lazy import makes Python startup
faster and reduces the number of imported modules at startup.
gh-111786: Optimize for space for _PyEval_EvalFrameDefault on MSVC for PGO (#111794)
In PGO mode, this function caused a compiler error in MSVC.
It turns out that optimizing for space only save the day, and is even faster.
However, without PGO, this is neither necessary nor slower.
Victor Stinner [Thu, 9 Nov 2023 15:00:10 +0000 (16:00 +0100)]
gh-111881: Import doctest lazily in libregrtest (#111884)
In most cases, doctest is not needed. So don't always import it at
startup. The change reduces the number of modules already
imported when a test is run.
Brett Cannon [Thu, 9 Nov 2023 01:20:35 +0000 (17:20 -0800)]
GH-111804: Drop posix.fallocate() under WASI (GH-111869)
Drop posix.fallocate() under WASI.
The underlying POSIX function, posix_fallocate(), was found to vary too
much between implementations to remain in WASI. As such, while it was
available in WASI preview1, it's been dropped in preview2.
Sam Gross [Wed, 8 Nov 2023 22:39:29 +0000 (17:39 -0500)]
gh-111569: Implement Python critical section API (gh-111571)
Critical sections are helpers to replace the global interpreter lock
with finer grained locking. They provide similar guarantees to the GIL
and avoid the deadlock risk that plain locking involves. Critical
sections are implicitly ended whenever the GIL would be released. They
are resumed when the GIL would be acquired. Nested critical sections
behave as if the sections were interleaved.
gh-68166: Tkinter: Add tests and examples for element_create() (GH-111453)
* Remove mention of "vsapi" element type from the documentation.
* Add tests for element_create() and other ttk.Style methods.
* Add examples for element_create() in the documentation.
Eric Snow [Mon, 6 Nov 2023 18:09:22 +0000 (11:09 -0700)]
gh-76785: Move _Py_excinfo Functions Out of the Internal C-API (gh-111715)
I added _Py_excinfo to the internal API (and added its functions in Python/errors.c) in gh-111530 (9322ce9). Since then I've had a nagging sense that I should have added the type and functions in its own PR. While I do plan on using _Py_excinfo outside crossinterp.c very soon (see gh-111572/gh-111573), I'd still feel more comfortable if the _Py_excinfo stuff went in as its own PR. Hence, here we are.
(FWIW, I may combine that with gh-111572, which I may, in turn, combine with gh-111573. We'll see.)
Fix test_unhandled_exceptions() of test_asyncio.test_streams: break
explicitly a reference cycle.
Fix also StreamTests.tearDown(): the loop must not be closed
explicitly, but using set_event_loop() which takes care of shutting
down the executor with executor.shutdown(wait=True).
BaseEventLoop.close() calls executor.shutdown(wait=False).
Victor Stinner [Sat, 4 Nov 2023 00:18:42 +0000 (01:18 +0100)]
gh-111644: Fix support threading_cleanup() (#111714)
Copy the list of dangling threads to make sure that the list of
"Dangling thread" is complete. Previously, the list was incomplete if
threads completed just before the list was displayed.
Changes:
* Rewrite the warning to make it easier to understand.
* Use support.sleeping_retry().
* threading_cleanup() no longer copies threading._dangling,
but only counts the number of dangling thread.
* Remove support.gc_support() call.