diff options
Diffstat (limited to 'Doc/whatsnew/3.9.rst')
| -rw-r--r-- | Doc/whatsnew/3.9.rst | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Doc/whatsnew/3.9.rst b/Doc/whatsnew/3.9.rst index 70809ff31c..9a7f2cd384 100644 --- a/Doc/whatsnew/3.9.rst +++ b/Doc/whatsnew/3.9.rst @@ -1124,7 +1124,7 @@ Changes in the Python API Changes in the C API -------------------- -* Instances of heap-allocated types (such as those created with +* Instances of :ref:`heap-allocated types <heap-types>` (such as those created with :c:func:`PyType_FromSpec` and similar APIs) hold a reference to their type object since Python 3.8. As indicated in the "Changes in the C API" of Python 3.8, for the vast majority of cases, there should be no side effect but for @@ -1147,7 +1147,8 @@ Changes in the C API If your traverse function delegates to ``tp_traverse`` of its base class (or another type), ensure that ``Py_TYPE(self)`` is visited only once. - Note that only heap types are expected to visit the type in ``tp_traverse``. + Note that only :ref:`heap type <heap-types>` are expected to visit the type + in ``tp_traverse``. For example, if your ``tp_traverse`` function includes: @@ -1160,7 +1161,7 @@ Changes in the C API .. code-block:: c #if PY_VERSION_HEX >= 0x03090000 - // This was not needed before Python 3.9 (Python issue 35810 and 40217) + // This was not needed before Python 3.9 (bpo-35810 and bpo-40217) if (base->tp_flags & Py_TPFLAGS_HEAPTYPE) { // a heap type's tp_traverse already visited Py_TYPE(self) } else { |