Jelle Zijlstra [Sun, 2 Jun 2024 15:13:24 +0000 (08:13 -0700)]
Improve documentation for typing.get_type_hints (#119928)
- Explicit list of what it does that is different from
"just return __annotations__"
- Remove reference to PEP 563; adding the future import doesn't
do anything to type aliases, and in general it will never make
get_type_hints() less likely to fail.
- Remove example, as the Annotated docs already have a similar
example, and it's unbalanced to have one example about this
one edge case but not about other behaviors of the function.
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
Remove the delegation of `int` to the `__trunc__` special method: `int` will now only delegate to `__int__` and `__index__` (in that order). `__trunc__` continues to exist, but its sole purpose is to support `math.trunc`.
PEP 667's description of the planned changes to PyEval_GetLocals
was internally inconsistent when accepted, so the docs added for
gh-74929 didn't match either the current behaviour or the intended
behaviour once gh-118934 is fixed.
This PR updates the documentation and 3.13 What's New to match the
intended behaviour (once gh-118934 is fixed).
It also tidies up lingering references to `f_locals` always being a
dictionary (this hasn't been true since at least when custom
namespace support for class statement execution was added)
Sam Gross [Sat, 1 Jun 2024 14:04:05 +0000 (10:04 -0400)]
gh-117657: Fix TSAN race in free-threaded GC (#119883)
Only call `gc_restore_tid()` from stop-the-world contexts.
`worklist_pop()` can be called while other threads are running, so use a
relaxed atomic to modify `ob_tid`.
Alyssa Coghlan [Sat, 1 Jun 2024 03:59:35 +0000 (13:59 +1000)]
gh-74929: PEP 667 C API documentation (gh-119379)
* Add docs for new APIs
* Add soft-deprecation notices
* Add What's New porting entries
* Update comments referencing `PyFrame_LocalsToFast()` to mention the proxy instead
* Other related cleanups found when looking for refs to the deprecated APIs
Jelle Zijlstra [Fri, 31 May 2024 21:05:24 +0000 (14:05 -0700)]
gh-119821: Support non-dict globals in LOAD_FROM_DICT_OR_GLOBALS (#119822)
Support non-dict globals in LOAD_FROM_DICT_OR_GLOBALS
The implementation basically copies LOAD_GLOBAL. Possibly it could be deduplicated,
but that seems like it may get hairy since the two operations have different operands.
This is important to fix in 3.14 for PEP 649, but it's a bug in earlier versions too,
and we should backport to 3.13 and 3.12 if possible.
Sam Gross [Fri, 31 May 2024 17:04:59 +0000 (13:04 -0400)]
gh-119369: Fix deadlock during thread exit in free-threaded build (#119528)
Release the GIL before calling `_Py_qsbr_unregister`.
The deadlock could occur when the GIL was enabled at runtime. The
`_Py_qsbr_unregister` call might block while holding the GIL because the
thread state was not active, but the GIL was still held.
Sam Gross [Fri, 31 May 2024 14:50:52 +0000 (10:50 -0400)]
gh-119585: Fix crash involving `PyGILState_Release()` and `PyThreadState_Clear()` (#119753)
Make sure that `gilstate_counter` is not zero in when calling
`PyThreadState_Clear()`. A destructor called from `PyThreadState_Clear()` may
call back into `PyGILState_Ensure()` and `PyGILState_Release()`. If
`gilstate_counter` is zero, it will try to create a new thread state before
the current active thread state is destroyed, leading to an assertion failure
or crash.
Joshua Herman [Fri, 31 May 2024 10:05:09 +0000 (05:05 -0500)]
gh-119189: Fix the power operator for Fraction (GH-119242)
When using the ** operator or pow() with Fraction as the base
and an exponent that is not rational, a float, or a complex, the
fraction is no longer converted to a float.
gh-103194: Fix Tkinter’s Tcl value type handling for Tcl 8.7/9.0 (GH-103846)
Some of standard Tcl types were renamed, removed, or no longer
registered in Tcl 8.7/9.0. This change fixes automatic conversion of Tcl
values to Python values to avoid returning a Tcl_Obj where the primary
Python types (int, bool, str, bytes) were returned in older Tcl.
Serhiy Storchaka [Thu, 30 May 2024 20:30:57 +0000 (23:30 +0300)]
gh-109218: Deprecate weird cases in the complex() constructor (GH-119620)
* Passing a string as the "real" keyword argument is now an error;
it should only be passed as a single positional argument.
* Passing a complex number as the "real" or "imag" argument is now deprecated;
it should only be passed as a single positional argument.
Serhiy Storchaka [Thu, 30 May 2024 20:20:07 +0000 (23:20 +0300)]
gh-109218: Improve documentation for the complex() constructor (GH-119687)
* Remove the equivalence with real+imag*1j which can be incorrect in corner
cases (non-finite numbers, the sign of zeroes).
* Separately document the three roles of the constructor: parsing a string,
converting a number, and constructing a complex from components.
* Document positional-only parameters of complex(), float(), int() and bool()
as positional-only.
* Add examples for complex() and int().
* Specify the grammar of the string for complex().
* Improve the grammar of the string for float().
* Describe more explicitly the behavior when real and/or imag arguments are
complex numbers. (This will be deprecated in future.)
Serhiy Storchaka [Thu, 30 May 2024 17:35:59 +0000 (20:35 +0300)]
gh-109218: Refactor tests for the complex() constructor (GH-119635)
* Share common classes.
* Use exactly representable floats and exact tests.
* Check the sign of zero components.
* Remove duplicated tests (mostly left after merging int and long).
* Reorder tests in more consistent way.
* Test more error messages.
* Add tests for missed cases.
Petr Viktorin [Thu, 30 May 2024 07:27:32 +0000 (09:27 +0200)]
gh-118235: Move RAISE_SYNTAX_ERROR actions to invalid rules and make sure they stay there (GH-119731)
The Full Grammar specification in the docs omits rule actions, so grammar rules that raise a syntax error looked like valid syntax.
This was solved in ef940de by hiding those rules in the custom syntax highlighter.
This moves all syntax-error alternatives to invalid rules, adds a validator that ensures that actions containing RAISE_SYNTAX_ERROR are in invalid rules, and reverts the syntax highlighter hack.
Zachary Ware [Wed, 29 May 2024 22:19:54 +0000 (17:19 -0500)]
subprocess docs: Fix semantically important typo (GH-119752)
GH-25416 accidentally replaced a reference to the *stderr* argument of
`subprocess.run` with a reference to the *stdin* argument. *stdin* is
not affected by the `check_output` option.
Barney Gale [Wed, 29 May 2024 20:51:04 +0000 (21:51 +0100)]
GH-119169: Implement `pathlib.Path.walk()` using `os.walk()` (#119573)
For silly reasons, pathlib's generic implementation of `walk()` currently
resides in `glob._Globber`. This commit moves it into
`pathlib._abc.PathBase.walk()` where it really belongs, and makes
`pathlib.Path.walk()` call `os.walk()`.
Sam Gross [Wed, 29 May 2024 19:26:04 +0000 (15:26 -0400)]
gh-119525: Fix deadlock with `_PyType_Lookup` and the GIL (#119527)
The deadlock only affected the free-threaded build and only occurred
when the GIL was enabled at runtime. The `Py_DECREF(old_name)` call
might temporarily release the GIL while holding the type seqlock.
Another thread may spin trying to acquire the seqlock while holding the
GIL.
The deadlock occurred roughly 1 in ~1,000 runs of `pool_in_threads.py`
from `test_multiprocessing_pool_circular_import`.
If one calls pow(fractions.Fraction, x, module) with modulo not None, the error message now says that the types are incompatible rather than saying pow only takes 2 arguments. Implemented by having fractions.Fraction __pow__ accept optional modulo argument and return NotImplemented if not None. pow() then raises with appropriate message.
---------
Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
Jason R. Coombs [Wed, 29 May 2024 16:43:19 +0000 (12:43 -0400)]
gh-118673: Remove shebang and executable bits from stdlib modules. (#119658)
* gh-118673: Remove shebang and executable bits from stdlib modules.
* Removed shebangs and exe bits on turtledemo scripts.
The setting was inappropriate for '__main__' and inconsistent across the other modules. The scripts can still be executed directly by invoking with the desired interpreter.
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com> Co-authored-by: Victor Stinner <vstinner@python.org>
Victor Stinner [Wed, 29 May 2024 09:37:04 +0000 (11:37 +0200)]
gh-119661: Add _Py_SINGLETON() include in Argumenet Clinic (#119712)
When the _Py_SINGLETON() is used, Argument Clinic now adds an
explicit "pycore_runtime.h" include to get the macro. Previously, the
macro may or may not be included indirectly by another include.
gh-119118: Fix performance regression in tokenize module (#119615)
* gh-119118: Fix performance regression in tokenize module
- Cache line object to avoid creating a Unicode object
for all of the tokens in the same line.
- Speed up byte offset to column offset conversion by using the
smallest buffer possible to measure the difference.
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>