mirror of
https://github.com/python/cpython.git
synced 2025-11-04 07:31:38 +00:00
86 lines
2.4 KiB
ReStructuredText
86 lines
2.4 KiB
ReStructuredText
.. highlightlang:: c
|
|
|
|
.. _typeobjects:
|
|
|
|
Type Objects
|
|
------------
|
|
|
|
.. index:: object: type
|
|
|
|
|
|
.. c:type:: PyTypeObject
|
|
|
|
The C structure of the objects used to describe built-in types.
|
|
|
|
|
|
.. c:var:: PyObject* PyType_Type
|
|
|
|
This is the type object for type objects; it is the same object as
|
|
:class:`type` in the Python layer.
|
|
|
|
|
|
.. c:function:: int PyType_Check(PyObject *o)
|
|
|
|
Return true if the object *o* is a type object, including instances of types
|
|
derived from the standard type object. Return false in all other cases.
|
|
|
|
|
|
.. c:function:: int PyType_CheckExact(PyObject *o)
|
|
|
|
Return true if the object *o* is a type object, but not a subtype of the
|
|
standard type object. Return false in all other cases.
|
|
|
|
|
|
.. c:function:: unsigned int PyType_ClearCache()
|
|
|
|
Clear the internal lookup cache. Return the current version tag.
|
|
|
|
.. c:function:: long PyType_GetFlags(PyTypeObject* type)
|
|
|
|
Return the :attr:`tp_flags` member of *type*. This function is primarily
|
|
meant for use with `Py_LIMITED_API`; the individual flag bits are
|
|
guaranteed to be stable across Python releases, but access to
|
|
:attr:`tp_flags` itself is not part of the limited API.
|
|
|
|
.. versionadded:: 3.2
|
|
|
|
.. c:function:: void PyType_Modified(PyTypeObject *type)
|
|
|
|
Invalidate the internal lookup cache for the type and all of its
|
|
subtypes. This function must be called after any manual
|
|
modification of the attributes or base classes of the type.
|
|
|
|
|
|
.. c:function:: int PyType_HasFeature(PyObject *o, int feature)
|
|
|
|
Return true if the type object *o* sets the feature *feature*. Type features
|
|
are denoted by single bit flags.
|
|
|
|
|
|
.. c:function:: int PyType_IS_GC(PyObject *o)
|
|
|
|
Return true if the type object includes support for the cycle detector; this
|
|
tests the type flag :const:`Py_TPFLAGS_HAVE_GC`.
|
|
|
|
|
|
.. c:function:: int PyType_IsSubtype(PyTypeObject *a, PyTypeObject *b)
|
|
|
|
Return true if *a* is a subtype of *b*.
|
|
|
|
|
|
.. c:function:: PyObject* PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems)
|
|
|
|
XXX: Document.
|
|
|
|
|
|
.. c:function:: PyObject* PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
|
|
XXX: Document.
|
|
|
|
|
|
.. c:function:: int PyType_Ready(PyTypeObject *type)
|
|
|
|
Finalize a type object. This should be called on all type objects to finish
|
|
their initialization. This function is responsible for adding inherited slots
|
|
from a type's base class. Return ``0`` on success, or return ``-1`` and sets an
|
|
exception on error.
|