使用Python的C API创建对象

Question

假设我的对象布局定义为:

typedef struct {
    PyObject_HEAD
    // Other stuff...
} pyfoo;

...和我的类型定义:

static PyTypeObject pyfoo_T = {
    PyObject_HEAD_INIT(NULL)
    // ...

    pyfoo_new,
};

如何pyfoo在C扩展中的某个位置创建新实例？

Answer 1

调用PyObject_New(),然后调用PyObject_Init ().

编辑:最好的方法是调用类对象,就像在Python本身一样:

/* Pass two arguments, a string and an int. */
PyObject *argList = Py_BuildValue("si", "hello", 42);

/* Call the class object. */
PyObject *obj = PyObject_CallObject((PyObject *) &pyfoo_T, argList);

/* Release the argument list. */
Py_DECREF(argList);