Also updated an example for default() in the module docstring.
Removed quotes around type name in other error messages.

bpo-31505: Fix an assertion failure in json, in case _json.make_encoder() received a bad encoder() argument. (#3643)

PR #3397 introduced a large number of warnings to the Windows build. This patch fixes them.

* group the (stateful) runtime globals into various topical structs
* consolidate the topical structs under a single top-level _PyRuntimeState struct
* add a check-c-globals.py script that helps identify runtime globals

Other globals are excluded (see globals.txt and check-c-globals.py).

when pass bad strict argument.

Rather than saving the Python object and calling PyObject_IsTrue()
every time when the boolean argument is used, call it only once and
save C boolean value.

It was possible to get a core dump by using uninitialized
_json objects. Now __new__ methods create initialized objects.
__init__ methods are removed.

possible but Coccinelle couldn't find opportunity.

Issue #28915: Without parenthesis, _PyObject_CallMethodId() avoids the creation
a temporary tuple, and so is more efficient.

Issue #28858: The change b9c9691c72c5 introduced a regression. It seems like
_PyObject_CallArg1() uses more stack memory than
PyObject_CallFunctionObjArgs().

* PyObject_CallFunctionObjArgs(func, NULL) => _PyObject_CallNoArg(func)
* PyObject_CallFunctionObjArgs(func, arg, NULL) => _PyObject_CallArg1(func, arg)

PyObject_CallFunctionObjArgs() allocates 40 bytes on the C stack and requires
extra work to "parse" C arguments to build a C array of PyObject*.

_PyObject_CallNoArg() and _PyObject_CallArg1() are simpler and don't allocate
memory on the C stack.

This change is part of the fastcall project. The change on listsort() is
related to the issue #23507.

inappropriate type.

PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()
to check for and handle errors correctly.

_codecs_cn, _codecs_hk, _codecs_iso2022, _codecs_jp, _codecs_kr and _codecs_tw
modules.

pyexpat.c doesn't need to redeclare PyMODINIT_FUNC, it's already declared in
Include/pyport.h.

Issue #23206: Make ``json.dumps(..., ensure_ascii=False)`` as fast as the default case of ``ensure_ascii=True``.  Patch by Naoki Inada.

Bug reported by Guido Vranken.

non-pydebug builds. Several extension modules now compile cleanly when
assert()s are enabled in standard builds (-DDEBUG flag).

Patch by Serhiy Storchaka.

Patch by Serhiy Storchaka.

Patch by Serhiy Storchaka.

Patch written by Serhiy Storchaka.

Patch by Serhiy Storchaka.