Objetos para indicaciones de tipado

Se proporcionan varios tipos incorporados para indicaciones de tipado. Actualmente existen dos tipos – GenericAlias y Union. Solo GenericAlias es expuesto a C.

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 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.

Aquí hay un ejemplo sobre cómo hacer un tipo de extensión genérica:

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

Ver también

The data model method __class_getitem__().

Added in version 3.9.

PyTypeObject Py_GenericAliasType

Part of the Stable ABI since version 3.9.

El tipo en C del objeto retornado por Py_GenericAlias(). Equivalente a types.GenericAlias en Python.

Added in version 3.9.