型ヒントのためのオブジェクト

Various built-in types for type hinting are provided. Only GenericAlias is exposed to C.

PyObject* Py_GenericAlias(PyObject *origin, PyObject *args)

Create a GenericAlias object. Equivalent to calling the Python class types.GenericAlias. The origin and args arguments set the GenericAlias's __origin__ and __args__ attributes respectively. origin should be a PyTypeObject*, and args can be a PyTupleObject* or any PyObject*. 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. The GenericAlias's __parameters__ attribute is constructed lazily from __args__. On failure, an exception is raised and NULL is returned.

以下は拡張の型をジェネリックにする例です。

...
static PyMethodDef my_obj_methods[] = {
    // Other methods.
    ...
    {"__class_getitem__", (PyCFunction)Py_GenericAlias, METH_O|METH_CLASS, "See PEP 585"}
    ...
}

参考

データモデルメソッド __class_getitem__() 。

バージョン 3.9 で追加.

PyTypeObject Py_GenericAliasType

Py_GenericAlias() により返されるCの型オブジェクトです。Pythonの types.GenericAlias と同等です。

バージョン 3.9 で追加.