Gregory P. Smith [Thu, 29 Dec 2022 22:41:39 +0000 (14:41 -0800)]
gh-100228: Warn from os.fork() if other threads exist. (#100229)
Not comprehensive, best effort warning. There are cases when threads exist on some platforms that this code cannot detect. macOS when API permissions allow and Linux with a readable /proc procfs present are the currently supported cases where a warning should show up reliably.
Starting with a DeprecationWarning for now, it is less disruptive than something like RuntimeWarning and most likely to only be seen in people's CI tests - a good place to start with this messaging.
It has had no effect on non-macOS platforms for a long time, and has had
the non-obvious effect of invoking `pkg_config` and not setting
`-DUSING_APPLE_OS_LIBFFI` on macOS since GH-22855.
Chris Withers [Wed, 28 Dec 2022 10:55:50 +0000 (10:55 +0000)]
Remove skipped test in test for async mocks. (#100559)
Remove skipped test.
See discussion on https://github.com/python/cpython/pull/25326.
Fix is apparently here, but no-one is confident to review and land: https://github.com/python/cpython/pull/25347.
Glyph [Sun, 25 Dec 2022 00:14:51 +0000 (16:14 -0800)]
gh-100519: simplification to `eff_request_host` in cookiejar.py (#99588)
`IPV4_RE` includes a `.`, and the `.find(".") == -1` included here is already testing to make sure there's no dot, so this part of the expression is tautological. Instead use more modern `in` syntax to make it clear what the check is doing here. The simplified implementation more clearly matches the wording in RFC 2965.
James Frost [Sat, 24 Dec 2022 18:28:59 +0000 (18:28 +0000)]
gh-100474: Fix handling of dirs named index.html in http.server (GH-100475)
If you had a directory called index.html or index.htm within a directory, it would cause http.server to return a 404 Not Found error instead of the directory listing. This came about due to not checking that the index was a regular file.
Shantanu [Sat, 24 Dec 2022 02:30:27 +0000 (20:30 -0600)]
gh-100268: Add is_integer method to int (#100439)
This improves the lives of type annotation users of `float` - which type checkers implicitly treat as `int|float` because that is what most code actually wants. Before this change a `.is_integer()` method could not be assumed to exist on things annotated as `: float` due to the method not existing on both types.
Barney Gale [Fri, 23 Dec 2022 22:52:23 +0000 (22:52 +0000)]
gh-68320, gh-88302 - Allow for private `pathlib.Path` subclassing (GH-31691)
Users may wish to define subclasses of `pathlib.Path` to add or modify
existing methods. Before this change, attempting to instantiate a subclass
raised an exception like:
AttributeError: type object 'PPath' has no attribute '_flavour'
Previously the `_flavour` attribute was assigned as follows:
Dennis Sweeney [Fri, 23 Dec 2022 18:15:47 +0000 (13:15 -0500)]
gh-94155: Reduce hash collisions for code objects (#100183)
* Uses a better hashing algorithm to get better dispersion and remove commutativity.
* Incorporates `co_firstlineno`, `Py_SIZE(co)`, and bytecode instructions.
* This is now the entire set of criteria used in `code_richcompare`, except for `_PyCode_ConstantKey` (which would incorporate the types of `co_consts` rather than just their values).
Eric Wieser [Fri, 23 Dec 2022 08:23:19 +0000 (08:23 +0000)]
gh-76963: PEP3118 itemsize of an empty ctypes array should not be 0 (GH-5576)
The itemsize returned in a memoryview of a ctypes array is now computed from the item type, instead of dividing the total size by the length and assuming that the length is not zero.
Shantanu [Wed, 21 Dec 2022 03:29:02 +0000 (21:29 -0600)]
gh-85267: Improvements to inspect.signature __text_signature__ handling (#98796)
This makes a couple related changes to inspect.signature's behaviour
when parsing a signature from `__text_signature__`.
First, `inspect.signature` is documented as only raising ValueError or
TypeError. However, in some cases, we could raise RuntimeError. This PR
changes that, thereby fixing #83685.
(Note that the new ValueErrors in RewriteSymbolics are caught and then
reraised with a message)
Second, `inspect.signature` could randomly drop parameters that it
didn't understand (corresponding to `return None` in the `p` function).
This is the core issue in #85267. I think this is very surprising
behaviour and it seems better to fail outright.
Third, adding this new failure broke a couple tests. To fix them (and to
e.g. allow `inspect.signature(select.epoll.register)` as in #85267), I
add constant folding of a couple binary operations to RewriteSymbolics.
(There's some discussion of making signature expression evaluation
arbitrary powerful in #68155. I think that's out of scope. The
additional constant folding here is pretty straightforward, useful, and
not much of a slippery slope)
Fourth, while #85267 is incorrect about the cause of the issue, it turns
out if you had consecutive newlines in __text_signature__, you'd get
`tokenize.TokenError`.
Finally, the `if name is invalid:` code path was dead, since
`parse_name` never returned `invalid`.
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com> Co-authored-by: Christian Heimes <christian@python.org> Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
Fixes https://github.com/python/cpython/issues/89051
Carlton Gibson [Sun, 18 Dec 2022 19:13:24 +0000 (20:13 +0100)]
gh-94912: Added marker for non-standard coroutine function detection (#99247)
This introduces a new decorator `@inspect.markcoroutinefunction`,
which, applied to a sync function, makes it appear async to
`inspect.iscoroutinefunction()`.