81 lines
2.1 KiB
ReStructuredText
81 lines
2.1 KiB
ReStructuredText
.. highlightlang:: c
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.. _typeobjects:
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Type Objects
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------------
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.. index:: object: type
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.. c:type:: PyTypeObject
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The C structure of the objects used to describe built-in types.
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.. c:var:: PyObject* PyType_Type
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.. index:: single: TypeType (in module types)
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This is the type object for type objects; it is the same object as ``type`` and
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``types.TypeType`` in the Python layer.
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.. c:function:: int PyType_Check(PyObject *o)
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Return true if the object *o* is a type object, including instances of types
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derived from the standard type object. Return false in all other cases.
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.. c:function:: int PyType_CheckExact(PyObject *o)
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Return true if the object *o* is a type object, but not a subtype of the
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standard type object. Return false in all other cases.
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.. c:function:: unsigned int PyType_ClearCache()
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Clear the internal lookup cache. Return the current version tag.
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.. c:function:: void PyType_Modified(PyTypeObject *type)
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Invalidate the internal lookup cache for the type and all of its
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subtypes. This function must be called after any manual
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modification of the attributes or base classes of the type.
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.. c:function:: int PyType_HasFeature(PyObject *o, int feature)
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Return true if the type object *o* sets the feature *feature*. Type features
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are denoted by single bit flags.
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.. c:function:: int PyType_IS_GC(PyObject *o)
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Return true if the type object includes support for the cycle detector; this
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tests the type flag :const:`Py_TPFLAGS_HAVE_GC`.
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.. c:function:: int PyType_IsSubtype(PyTypeObject *a, PyTypeObject *b)
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Return true if *a* is a subtype of *b*.
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.. c:function:: PyObject* PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems)
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XXX: Document.
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.. c:function:: PyObject* PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds)
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XXX: Document.
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.. c:function:: int PyType_Ready(PyTypeObject *type)
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Finalize a type object. This should be called on all type objects to finish
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their initialization. This function is responsible for adding inherited slots
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from a type's base class. Return ``0`` on success, or return ``-1`` and sets an
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exception on error.
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