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Title: Type Objects — Python 3.12.12 documentation

Open Graph Title: Type Objects

Description: Creating Heap-Allocated Types: The following functions and structs are used to create heap types.

Open Graph Description: Creating Heap-Allocated Types: The following functions and structs are used to create heap types.

Opengraph URL: https://docs.python.org/3/c-api/type.html

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og:image	https://docs.python.org/3.12/_images/social_previews/summary_c-api_type_c4ee7a5d.png
og:image:alt	Creating Heap-Allocated Types: The following functions and structs are used to create heap types.
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Links:

	https://www.python.org/
Table of Contents	https://docs.python.org/3.12/contents.html
Type Objects	https://docs.python.org/3.12/c-api/type.html
Creating Heap-Allocated Types	https://docs.python.org/3.12/c-api/type.html#creating-heap-allocated-types
Concrete Objects Layer	https://docs.python.org/3.12/c-api/concrete.html
The None Object	https://docs.python.org/3.12/c-api/none.html
Report a Bug	https://docs.python.org/3.12/bugs.html
Show Source	https://github.com/python/cpython/blob/main/Doc/c-api/type.rst
index	https://docs.python.org/3.12/genindex.html
modules	https://docs.python.org/3.12/py-modindex.html
next	https://docs.python.org/3.12/c-api/none.html
previous	https://docs.python.org/3.12/c-api/concrete.html
Python	https://www.python.org/
3.12.12 Documentation	https://docs.python.org/3.12/index.html
Python/C API Reference Manual	https://docs.python.org/3.12/c-api/index.html
Concrete Objects Layer	https://docs.python.org/3.12/c-api/concrete.html
Type Objects	https://docs.python.org/3.12/c-api/type.html
¶	https://docs.python.org/3.12/c-api/type.html#type-objects
¶	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
Limited API	https://docs.python.org/3.12/c-api/stable.html#stable
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Type
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
type	https://docs.python.org/3.12/library/functions.html#type
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Check
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_CheckExact
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_ClearCache
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetFlags
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
tp_flags	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_flags
tp_flags	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_flags
limited API	https://docs.python.org/3.12/c-api/stable.html#limited-c-api
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetDict
cls.__dict__	https://docs.python.org/3.12/reference/datamodel.html#type.__dict__
tp_dict	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_dict
PyObject_GetAttr()	https://docs.python.org/3.12/c-api/object.html#c.PyObject_GetAttr
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Modified
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
PyType_WatchCallback	https://docs.python.org/3.12/c-api/type.html#c.PyType_WatchCallback
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_AddWatcher
PyType_Watch()	https://docs.python.org/3.12/c-api/type.html#c.PyType_Watch
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_ClearWatcher
PyType_AddWatcher()	https://docs.python.org/3.12/c-api/type.html#c.PyType_AddWatcher
PyType_AddWatcher()	https://docs.python.org/3.12/c-api/type.html#c.PyType_AddWatcher
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Watch
PyType_AddWatcher()	https://docs.python.org/3.12/c-api/type.html#c.PyType_AddWatcher
PyType_Modified()	https://docs.python.org/3.12/c-api/type.html#c.PyType_Modified
PyType_AddWatcher()	https://docs.python.org/3.12/c-api/type.html#c.PyType_AddWatcher
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_WatchCallback
PyType_Modified()	https://docs.python.org/3.12/c-api/type.html#c.PyType_Modified
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_HasFeature
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_IS_GC
Py_TPFLAGS_HAVE_GC	https://docs.python.org/3.12/c-api/typeobj.html#c.Py_TPFLAGS_HAVE_GC
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_IsSubtype
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
__subclasscheck__()	https://docs.python.org/3.12/reference/datamodel.html#type.__subclasscheck__
PyObject_IsSubclass()	https://docs.python.org/3.12/c-api/object.html#c.PyObject_IsSubclass
issubclass()	https://docs.python.org/3.12/library/functions.html#issubclass
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
Py_ssize_t	https://docs.python.org/3.12/c-api/intro.html#c.Py_ssize_t
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GenericAlloc
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
tp_alloc	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_alloc
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GenericNew
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
tp_new	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_new
tp_alloc	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_alloc
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Ready
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
Py_TPFLAGS_HAVE_GC	https://docs.python.org/3.12/c-api/typeobj.html#c.Py_TPFLAGS_HAVE_GC
Py_TPFLAGS_HAVE_GC	https://docs.python.org/3.12/c-api/typeobj.html#c.Py_TPFLAGS_HAVE_GC
tp_traverse	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_traverse
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetName
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
__name__	https://docs.python.org/3.12/reference/datamodel.html#type.__name__
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetQualName
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
__qualname__	https://docs.python.org/3.12/reference/datamodel.html#type.__qualname__
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetSlot
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
PyType_Slot.slot	https://docs.python.org/3.12/c-api/type.html#c.PyType_Slot.slot
PyType_GetSlot()	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetSlot
heap types	https://docs.python.org/3.12/c-api/typeobj.html#heap-types
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetModule
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
PyType_FromModuleAndSpec()	https://docs.python.org/3.12/c-api/type.html#c.PyType_FromModuleAndSpec
TypeError	https://docs.python.org/3.12/library/exceptions.html#TypeError
PyCMethod	https://docs.python.org/3.12/c-api/structures.html#c.PyCMethod
PyType_GetModuleByDef()	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetModuleByDef
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetModuleState
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
PyModule_GetState()	https://docs.python.org/3.12/c-api/module.html#c.PyModule_GetState
PyType_GetModule()	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetModule
TypeError	https://docs.python.org/3.12/library/exceptions.html#TypeError
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
PyModuleDef	https://docs.python.org/3.12/c-api/module.html#c.PyModuleDef
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetModuleByDef
PyModuleDef	https://docs.python.org/3.12/c-api/module.html#c.PyModuleDef
TypeError	https://docs.python.org/3.12/library/exceptions.html#TypeError
PyModule_GetState()	https://docs.python.org/3.12/c-api/module.html#c.PyModule_GetState
tp_init	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_init
nb_add	https://docs.python.org/3.12/c-api/typeobj.html#c.PyNumberMethods.nb_add
PyCMethod	https://docs.python.org/3.12/c-api/structures.html#c.PyCMethod
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyUnstable_Type_AssignVersionTag
Unstable API	https://docs.python.org/3.12/c-api/stable.html#unstable-c-api
¶	https://docs.python.org/3.12/c-api/type.html#creating-heap-allocated-types
heap types	https://docs.python.org/3.12/c-api/typeobj.html#heap-types
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyType_Spec	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_FromMetaclass
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
heap type	https://docs.python.org/3.12/c-api/typeobj.html#heap-types
Py_TPFLAGS_HEAPTYPE	https://docs.python.org/3.12/c-api/typeobj.html#c.Py_TPFLAGS_HEAPTYPE
tp_new	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_new
object	https://docs.python.org/3.12/library/functions.html#object
PyType_GetModule()	https://docs.python.org/3.12/c-api/type.html#c.PyType_GetModule
PyType_Ready()	https://docs.python.org/3.12/c-api/type.html#c.PyType_Ready
type()	https://docs.python.org/3.12/library/functions.html#type
class	https://docs.python.org/3.12/reference/compound_stmts.html#class
calling	https://docs.python.org/3.12/c-api/call.html#capi-call
type	https://docs.python.org/3.12/library/functions.html#type
__new__()	https://docs.python.org/3.12/reference/datamodel.html#object.__new__
__init__()	https://docs.python.org/3.12/reference/datamodel.html#object.__init__
__init_subclass__()	https://docs.python.org/3.12/reference/datamodel.html#object.__init_subclass__
__set_name__()	https://docs.python.org/3.12/reference/datamodel.html#object.__set_name__
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyType_Spec	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_FromModuleAndSpec
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
type	https://docs.python.org/3.12/library/functions.html#type
tp_new	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_new
tp_new	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_new
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyType_Spec	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_FromSpecWithBases
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
type	https://docs.python.org/3.12/library/functions.html#type
tp_new	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_new
tp_new	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_new
PyObject	https://docs.python.org/3.12/c-api/structures.html#c.PyObject
PyType_Spec	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_FromSpec
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
type	https://docs.python.org/3.12/library/functions.html#type
tp_new	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_new
tp_new	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_new
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec.name
PyTypeObject.tp_name	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_name
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec.basicsize
PyTypeObject.tp_basicsize	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_basicsize
tp_basicsize	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_basicsize
PyObject_GetTypeData()	https://docs.python.org/3.12/c-api/object.html#c.PyObject_GetTypeData
tp_basicsize	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_basicsize
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec.itemsize
PyTypeObject.tp_itemsize	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_itemsize
tp_itemsize	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_itemsize
tp_itemsize	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_itemsize
PyType_Spec.basicsize	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec.basicsize
PyType_Spec.basicsize	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec.basicsize
Py_TPFLAGS_ITEMS_AT_END	https://docs.python.org/3.12/c-api/typeobj.html#c.Py_TPFLAGS_ITEMS_AT_END
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec.flags
PyTypeObject.tp_flags	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_flags
PyType_FromSpecWithBases()	https://docs.python.org/3.12/c-api/type.html#c.PyType_FromSpecWithBases
PyType_Slot	https://docs.python.org/3.12/c-api/type.html#c.PyType_Slot
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Spec.slots
PyType_Slot	https://docs.python.org/3.12/c-api/type.html#c.PyType_Slot
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Slot
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Slot.slot
PyTypeObject	https://docs.python.org/3.12/c-api/type.html#c.PyTypeObject
PyNumberMethods	https://docs.python.org/3.12/c-api/typeobj.html#c.PyNumberMethods
PySequenceMethods	https://docs.python.org/3.12/c-api/typeobj.html#c.PySequenceMethods
PyMappingMethods	https://docs.python.org/3.12/c-api/typeobj.html#c.PyMappingMethods
PyAsyncMethods	https://docs.python.org/3.12/c-api/typeobj.html#c.PyAsyncMethods
PyTypeObject.tp_dealloc	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_dealloc
PyNumberMethods.nb_add	https://docs.python.org/3.12/c-api/typeobj.html#c.PyNumberMethods.nb_add
PySequenceMethods.sq_length	https://docs.python.org/3.12/c-api/typeobj.html#c.PySequenceMethods.sq_length
PyType_Slot	https://docs.python.org/3.12/c-api/type.html#c.PyType_Slot
tp_weaklistoffset	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_weaklistoffset
Py_TPFLAGS_MANAGED_WEAKREF	https://docs.python.org/3.12/c-api/typeobj.html#c.Py_TPFLAGS_MANAGED_WEAKREF
tp_dictoffset	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_dictoffset
Py_TPFLAGS_MANAGED_DICT	https://docs.python.org/3.12/c-api/typeobj.html#c.Py_TPFLAGS_MANAGED_DICT
tp_vectorcall_offset	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_vectorcall_offset
PyMemberDef	https://docs.python.org/3.12/c-api/structures.html#pymemberdef-offsets
Py_tp_members	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_members
PyMemberDef documentation	https://docs.python.org/3.12/c-api/structures.html#pymemberdef-offsets
tp_vectorcall	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_vectorcall
tp_new	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_new
tp_init	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_init
tp_dict	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_dict
tp_mro	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_mro
tp_cache	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_cache
tp_subclasses	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_subclasses
tp_weaklist	https://docs.python.org/3.12/c-api/typeobj.html#c.PyTypeObject.tp_weaklist
PyType_FromSpecWithBases()	https://docs.python.org/3.12/c-api/type.html#c.PyType_FromSpecWithBases
PyBufferProcs	https://docs.python.org/3.12/c-api/typeobj.html#c.PyBufferProcs
bf_getbuffer	https://docs.python.org/3.12/c-api/typeobj.html#c.PyBufferProcs.bf_getbuffer
bf_releasebuffer	https://docs.python.org/3.12/c-api/typeobj.html#c.PyBufferProcs.bf_releasebuffer
limited API	https://docs.python.org/3.12/c-api/stable.html#limited-c-api
¶	https://docs.python.org/3.12/c-api/type.html#c.PyType_Slot.pfunc
Table of Contents	https://docs.python.org/3.12/contents.html
Type Objects	https://docs.python.org/3.12/c-api/type.html
Creating Heap-Allocated Types	https://docs.python.org/3.12/c-api/type.html#creating-heap-allocated-types
Concrete Objects Layer	https://docs.python.org/3.12/c-api/concrete.html
The None Object	https://docs.python.org/3.12/c-api/none.html
Report a Bug	https://docs.python.org/3.12/bugs.html
Show Source	https://github.com/python/cpython/blob/main/Doc/c-api/type.rst
index	https://docs.python.org/3.12/genindex.html
modules	https://docs.python.org/3.12/py-modindex.html
next	https://docs.python.org/3.12/c-api/none.html
previous	https://docs.python.org/3.12/c-api/concrete.html
Python	https://www.python.org/
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