python / cpython

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>

I believe this is a mistake. SIGCHLD is only available on Unix systems, not Windows.

Added slice support to the `pathlib.Path.parents` sequence. For a `Path` `p`, slices of `p.parents` should return the same thing as slices of `tuple(p.parents)`.

…H-23042)

See https: //github.com/python/core-workflow/issues/380

Signed-off-by: Filipe Laíns <lains@archlinux.org>

Use @staticmethod on methods using @classmethod but don't use their
cls parameter on the following classes:

* BuiltinImporter
* FrozenImporter
* WindowsRegistryFinder
* PathFinder

Leave methods using @_requires_builtin or @_requires_frozen unchanged,
since this decorator requires the wrapped method to have an extra parameter
(cls or self).

…ate (PEP 384) (GH-23393)

All types in _ssl module are now heap types.

Signed-off-by: Christian Heimes <christian@python.org>

Inspect.getdoc(ob) sometimes gets docstrings when ob.__doc__ is None.

…H-23386)

* Whatsnew entry in 3.9 same as the one in 3.10.
* versionchanged for typing.Literal docs

Needs backport to 3.9.

Fix hash implementation of `typing.Literal`.

Update docs regarding `typing.Litaral` caching.

Base implementation was done in PR #23294.

…zation (GH-23404)

Signed-off-by: Christian Heimes <christian@python.org>

Automerge-Triggered-By: GH:tiran

Signed-off-by: Christian Heimes <christian@python.org>

Automerge-Triggered-By: GH:tiran

Signed-off-by: Christian Heimes <christian@python.org>

Simplify the importlib external bootstrap code:
importlib._bootstrap_external now uses regular imports to import
builtin modules. When it is imported, the builtin __import__()
function is already fully working and so can be used to import
builtin modules like sys.

Remove unused imports and unused local variables.

Signed-off-by: Christian Heimes <christian@python.org>

Signed-off-by: Christian Heimes <christian@python.org>

Automerge-Triggered-By: GH:tiran

Signed-off-by: Christian Heimes <christian@python.org>

Signed-off-by: Christian Heimes <christian@python.org>

Same as FreeBSD, file descriptors in /dev/fd id from 0 to 63.

Automerge-Triggered-By: GH:lysnikolaou

Port the _warnings extension module to the multi-phase initialization
API (PEP 489).

Convert the _imp extension module to the multi-phase initialization
API (PEP 489).

* Add _PyImport_BootstrapImp() which fix a bootstrap issue: import
  the _imp module before importlib is initialized.
* Add create_builtin() sub-function, used by _imp_create_builtin().
* Initialize PyInterpreterState.import_func earlier, in
  pycore_init_builtins().
* Remove references to _PyImport_Cleanup(). This function has been
  renamed to finalize_modules() and moved to pylifecycle.c.

A follow up for 0e2ac21

Updated docs to include `Py_TPFLAGS_HAVE_AM_SEND`. News section should not be necessary.

Automerge-Triggered-By: GH:asvetlov

This change partically reverts
commit ad3252b
and the commit fe2978b.

Many third party C extension modules rely on the ability of using
Py_TYPE() to set an object type: "Py_TYPE(obj) = type;" or to set an
object type using: "Py_SIZE(obj) = size;".

Signed-off-by: Christian Heimes <christian@python.org>

Automerge-Triggered-By: GH:tiran

Signed-off-by: Christian Heimes <christian@python.org>