python / cpython

…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>

)

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

Fix a race condition in "make regen-all" when make -jN option is used
to run jobs in parallel. The clinic.py script now only use atomic
write to write files. Moveover, generated files are now left
unchanged if the content does not change, to not change the file
modification time.

The "make regen-all" command runs "make clinic" and "make
regen-importlib" targets:

* "make regen-importlib" builds object files (ex: Modules/_weakref.o)
  from source files (ex: Modules/_weakref.c) and clinic files (ex:
  Modules/clinic/_weakref.c.h)
* "make clinic" always rewrites all clinic files
  (ex: Modules/clinic/_weakref.c.h)

Since there is no dependency between "clinic" and "regen-importlib"
Makefile targets, these two targets can be run in parallel. Moreover,
half of clinic.py file writes are not atomic and so there is a race
condition when "make regen-all" runs jobs in parallel using make -jN
option (which can be passed in MAKEFLAGS environment variable).

Fix clinic.py to make all file writes atomic:

* Add write_file() function to ensure that all file writes are
  atomic: write into a temporary file and then use os.replace().
* Moreover, write_file() doesn't recreate or modify the file if the
  content does not change to avoid modifying the file modification
  file.
* Update test_clinic to verify these assertions with a functional
  test.
* Remove Clinic.force attribute which was no longer used, whereas
  Clinic.verify remains useful.

skip test_min_max_version_mismatch when TLS 1.0 is not available

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

Automerge-Triggered-By: GH:asvetlov

…H-23357)

Automerge-Triggered-By: GH:asvetlov

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

Co-Authored-By: Mohamed Koubaa <koubaa.m@gmail.com>

On AIX, splice() only works with a socket, whereas the test uses a
pipe.

Some `__slots__` where before the docstring, hiding them.