7.1.1 Type Objects

7.1.1 Type Objects

PyTypeObject

The C structure of the objects used to describe built-in types.

PyObject* PyType_Type

This is the type object for type objects; it is the same object as types.TypeType in the Python layer.

int PyType_Check(

PyObject *o)

Returns true if the object o is a type object, including instances of types derived from the standard type object. Returns false in all other cases.

int PyType_CheckExact(

PyObject *o)

Returns true if the object o is a type object, but not a subtype of the standard type object. Returns false in all other cases. New in version 2.2.

int PyType_HasFeature(

PyObject *o, int feature)

Returns true if the type object o sets the feature feature. Type features are denoted by single bit flags.

int PyType_IS_GC(

PyObject *o)

Return true if the type object includes support for the cycle detector; this tests the type flag Py_TPFLAGS_HAVE_GC. New in version 2.0.

int PyType_IsSubtype(

PyTypeObject *a, PyTypeObject *b)

Returns true if a is a subtype of b. New in version 2.2.

PyObject* PyType_GenericAlloc(

PyTypeObject *type, int nitems)

Return value: New reference.

New in version 2.2.

PyObject* PyType_GenericNew(

PyTypeObject *type, PyObject *args, PyObject *kwds)

Return value: New reference.

New in version 2.2.

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. Returns 0 on success, or returns -1 and sets an exception on error. New in version 2.2.

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Python/C API Reference Manual

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Release 2.4, documentation updated on 29 November 2004.