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What's New in Python 3.11: move C API changes (#92390)

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Move C API changes to the C API > Porting to Python 3.11 section.
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Victor Stinner 2022-05-09 12:40:56 +02:00 • committed by GitHub
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Doc/whatsnew/3.11.rst
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@ -1501,37 +1501,6 @@ Build Changes
C API Changes
=============
* :c:func:`PyErr_SetExcInfo()` no longer uses the ``type`` and ``traceback``
arguments, the interpreter now derives those values from the exception
instance (the ``value`` argument). The function still steals references
of all three arguments.
(Contributed by Irit Katriel in :issue:`45711`.)
* :c:func:`PyErr_GetExcInfo()` now derives the ``type`` and ``traceback``
fields of the result from the exception instance (the ``value`` field).
(Contributed by Irit Katriel in :issue:`45711`.)
* :c:type:`_frozen` has a new ``is_package`` field to indicate whether
or not the frozen module is a package. Previously, a negative value
in the ``size`` field was the indicator. Now only non-negative values
be used for ``size``.
(Contributed by Kumar Aditya in :issue:`46608`.)
* :c:func:`_PyFrameEvalFunction` now takes ``_PyInterpreterFrame*``
as its second parameter, instead of ``PyFrameObject*``.
See :pep:`523` for more details of how to use this function pointer type.
* :c:func:`PyCode_New` and :c:func:`PyCode_NewWithPosOnlyArgs` now take
an additional ``exception_table`` argument.
Using these functions should be avoided, if at all possible.
To get a custom code object: create a code object using the compiler,
then get a modified version with the ``replace`` method.
* :c:type:`PyCodeObject` no longer has a ``co_code`` field. Instead,
use ``PyObject_GetAttrString(code_object, "co_code")`` or
:c:func:`PyCode_GetCode` to get the underlying bytes object.
(Contributed by Brandt Bucher in :issue:`46841` and Ken Jin in :gh:`92154`.)
New Features
------------
@ -1598,6 +1567,37 @@ New Features
Porting to Python 3.11
----------------------
* :c:func:`PyErr_SetExcInfo()` no longer uses the ``type`` and ``traceback``
arguments, the interpreter now derives those values from the exception
instance (the ``value`` argument). The function still steals references
of all three arguments.
(Contributed by Irit Katriel in :issue:`45711`.)
* :c:func:`PyErr_GetExcInfo()` now derives the ``type`` and ``traceback``
fields of the result from the exception instance (the ``value`` field).
(Contributed by Irit Katriel in :issue:`45711`.)
* :c:type:`_frozen` has a new ``is_package`` field to indicate whether
or not the frozen module is a package. Previously, a negative value
in the ``size`` field was the indicator. Now only non-negative values
be used for ``size``.
(Contributed by Kumar Aditya in :issue:`46608`.)
* :c:func:`_PyFrameEvalFunction` now takes ``_PyInterpreterFrame*``
as its second parameter, instead of ``PyFrameObject*``.
See :pep:`523` for more details of how to use this function pointer type.
* :c:func:`PyCode_New` and :c:func:`PyCode_NewWithPosOnlyArgs` now take
an additional ``exception_table`` argument.
Using these functions should be avoided, if at all possible.
To get a custom code object: create a code object using the compiler,
then get a modified version with the ``replace`` method.
* :c:type:`PyCodeObject` no longer has a ``co_code`` field. Instead,
use ``PyObject_GetAttrString(code_object, "co_code")`` or
:c:func:`PyCode_GetCode` to get the underlying bytes object.
(Contributed by Brandt Bucher in :issue:`46841` and Ken Jin in :gh:`92154`.)
* The old trashcan macros (``Py_TRASHCAN_SAFE_BEGIN``/``Py_TRASHCAN_SAFE_END``)
are now deprecated. They should be replaced by the new macros
``Py_TRASHCAN_BEGIN`` and ``Py_TRASHCAN_END``.