类型注解对象¶
提供几种用于类型提示的内置类型。 目前存在两种类型 – GenericAlias 和 Union。 只有 GenericAlias
会向 C 开放。
-
PyObject *Py_GenericAlias(PyObject *origin, PyObject *args)¶
- Part of the Stable ABI since version 3.9.
Create a GenericAlias object. Equivalent to calling the Python class
types.GenericAlias
. The origin and args arguments set theGenericAlias
‘s__origin__
and__args__
attributes respectively. origin should be a PyTypeObject*, and args can be a PyTupleObject* or anyPyObject*
. If args passed is not a tuple, a 1-tuple is automatically constructed and__args__
is set to(args,)
. Minimal checking is done for the arguments, so the function will succeed even if origin is not a type. TheGenericAlias
‘s__parameters__
attribute is constructed lazily from__args__
. On failure, an exception is raised andNULL
is returned.下面是一个如何创建一个扩展类型泛型的例子:
... static PyMethodDef my_obj_methods[] = { // Other methods. ... {"__class_getitem__", Py_GenericAlias, METH_O|METH_CLASS, "See PEP 585"} ... }
参见
数据模型的方法
__class_getitem__()
。3.9 新版功能.
-
PyTypeObject Py_GenericAliasType¶
- Part of the Stable ABI since version 3.9.
由
Py_GenericAlias()
所返回的对象的 C 类型。等价于 Python 中的types.GenericAlias
。3.9 新版功能.