Create an object using Python's C API

Say I have my object layout defined as:

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

…and my type definition:

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

    pyfoo_new,
};

How do I create a new instance of pyfoo somewhere within my C extension?

Here is Solutions:

We have many solutions to this problem, But we recommend you to use the first solution because it is tested & true solution that will 100% work for you.

Solution 1

Call PyObject_New(), followed by PyObject_Init().

EDIT: The best way is to call the class object, just like in Python itself:

/* 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);

Note: Use and implement solution 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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