ImportError: dynamic module does not define init function (initfizzbuzz)

Question

I tried to compile fizzbuzz.c, in order to import it by python. For building fizzbuzz.c,I used python setup.py build_ext -i.

A

Answer 1

You should define a function named init_fizzbuzz, that should contain the code to initialize the module. This function should also call Py_InitModule, to setup the bindings for the c functions in Python. For further info, check out this tutorial.

In yor case, your code should be adapted to something like this:

static PyObject* py_fizzbuzz(PyObject* self, PyObject* args)
{
    int value;
    if (!PyArg_ParseTuple(args, "i", &value))
        return NULL;
    for (int i=1; i <= n; i++){
        if (i % 3 == 0 && i % 5 ==0){
            printf("fizzbuzz %d \n", i);
            }
        else if (i % 3 == 0){
            printf("fizz %d \n", i);
            }
        else if(i % 5 == 0){
            printf("buzz %d \n", i);
            }
        }

    // Return value.
    return Py_BuildValue("i", 0);

}

// Mapping between python and c function names. 
static PyMethodDef fizzbuzzModule_methods[] = {
    {"fizzbuzz", py_fizzbuzz, METH_VARARGS},
    {NULL, NULL}
    };

// Module initialisation routine.
void init_fizzbuzz(void)
{
    // Init module.
    (void) Py_InitModule("fizzbuzz", fizzbuzzModule_methods);

}