python / cpython

The Py_TRASHCAN_BEGIN macro no longer accesses PyTypeObject attributes,
but now can get the condition by calling the new private
_PyTrash_cond() function which hides implementation details.

Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>

…3491)

The smelly.py script now also checks the Python dynamic library and
extension modules, not only the Python static library. Make also the
script more verbose: explain what it does.

The GitHub Action job now builds Python with the libpython dynamic
library.

This commit also fixes up some of the overlapping documentation changed
in bpo-35498, which added support for indexing with slices.

Fixes bpo-21041.
https://bugs.python.org/issue21041

Co-authored-by: Paul Ganssle <p.ganssle@gmail.com>
Co-authored-by: Rémi Lapeyre <remi.lapeyre@henki.fr>

GH-23475)

Co-authored-by: Chris Jerdonek <chris.jerdonek@gmail.com>

… small containers (GH-22120)

The function accepts now the representation of the default state as
empty sequence (as returned by Style.map()).
The structure of the result is now the same on all platform
and does not depend on the value of wantobjects.

* Speed up comparison of bytes objects with non-bytes objects when
  option -b is specified.
* Speed up comparison of bytarray objects with non-buffer object.

…-23441)

…23449)

Removing 'evaluate' makes it more consistent with other assertX entries.

…-23301)

On macOS system provided libraries are in a shared library cache
and not at their usual location. This PR teaches distutils to search
in the SDK, even if there was no "-sysroot" argument in
the compiler flags.

…GH-23447)

…cOS (GH-23293)

Building on older versions, and in particular macOS 10.9 still use
Tk 8.6.8 because of build problems on that version of macOS.

…22910)

As [bpo-38443]() says the error message from configure when specifying --enable-universalsdk with a set of architectures that is not supported by the compiler is not very helpful.   This PR explicitly checks if the compiler works and bails out if it doesn't.

…H-23272)

…H-23446)

…eAndSpec() (GH-23410)

* There were leaks if Py_tp_bases is used more than once or if some call is
  failed before setting tp_bases.
* There was a crash if the bases argument or the Py_tp_bases slot is not a tuple.
* The documentation was not accurate.

….send_signal. (GH-20010)

send_signal() now swallows the exception if the process it thought was still alive winds up not to exist anymore (always a plausible race condition despite the checks).

Co-authored-by: Gregory P. Smith <greg@krypto.org>

* bpo-40791: Make compare_digest more constant-time.

The existing volatile `left`/`right` pointers guarantee that the reads will all occur, but does not guarantee that they will be _used_. So a compiler can still short-circuit the loop, saving e.g. the overhead of doing the xors and especially the overhead of the data dependency between `result` and the reads. That would change performance depending on where the first unequal byte occurs. This change removes that optimization.

(This is change #1 from https://bugs.python.org/issue40791 .)

…3431)

We also update the "ignored" file with a temporary list of all known globals.

By attempting to avoid backslashes in f-string expressions.
We also now proactively raise errors for some backslashes we can't
avoid while unparsing FormattedValues

Co-authored-by: hauntsaninja <>
Co-authored-by: Shantanu <hauntsaninja@users.noreply.github.com>
Co-authored-by: Batuhan Taskaya <isidentical@gmail.com>