类型对象¶
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PyTypeObject
¶ 对象的 C 结构用于描述 built-in 类型。
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unsigned int
PyType_ClearCache
()¶ Clear the internal lookup cache. Return the current version tag.
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unsigned long
PyType_GetFlags
(PyTypeObject* type)¶ Return the
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 totp_flags
itself is not part of the limited API.3.2 版新加入.
3.4 版更變: The return type is now
unsigned long
rather thanlong
.
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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.
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int
PyType_HasFeature
(PyTypeObject *o, int feature)¶ Return true if the type object o sets the feature feature. Type features are denoted by single bit flags.
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int
PyType_IS_GC
(PyTypeObject *o)¶ Return true if the type object includes support for the cycle detector; this tests the type flag
Py_TPFLAGS_HAVE_GC
.
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int
PyType_IsSubtype
(PyTypeObject *a, PyTypeObject *b)¶ Return true if a is a subtype of b.
This function only checks for actual subtypes, which means that
__subclasscheck__()
is not called on b. CallPyObject_IsSubclass()
to do the same check thatissubclass()
would do.
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PyObject*
PyType_GenericAlloc
(PyTypeObject *type, Py_ssize_t nitems)¶ - Return value: New reference.
Generic handler for the
tp_alloc
slot of a type object. Use Python’s default memory allocation mechanism to allocate a new instance and initialize all its contents to NULL.
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PyObject*
PyType_GenericNew
(PyTypeObject *type, PyObject *args, PyObject *kwds)¶ - Return value: New reference.
Generic handler for the
tp_new
slot of a type object. Create a new instance using the type’stp_alloc
slot.
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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.
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PyObject*
PyType_FromSpec
(PyType_Spec *spec)¶ Creates and returns a heap type object from the spec passed to the function.
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PyObject*
PyType_FromSpecWithBases
(PyType_Spec *spec, PyObject *bases)¶ Creates and returns a heap type object from the spec. In addition to that, the created heap type contains all types contained by the bases tuple as base types. This allows the caller to reference other heap types as base types.
3.3 版新加入.
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void*
PyType_GetSlot
(PyTypeObject *type, int slot)¶ Return the function pointer stored in the given slot. If the result is NULL, this indicates that either the slot is NULL, or that the function was called with invalid parameters. Callers will typically cast the result pointer into the appropriate function type.
3.4 版新加入.