How can I simulate the following Python function using the Python C API?
def foo(bar, baz="something or other"):
print bar, baz
(i.e., so that it is possible to call it via:
>>> foo("hello")
hello something or other
>>> foo("hello", baz="world!")
hello world!
>>> foo("hello", "world!")
hello, world!
)
See the docs: you want to use PyArg_ParseTupleAndKeywords, documented at the URL I gave.
So for example:
def foo(bar, baz="something or other"):
print bar, baz
becomes (roughly -- haven't tested it!):
#include "Python.h"
static PyObject *
themodule_foo(PyObject *self, PyObject *args, PyObject *keywds)
{
char *bar;
char *baz = "something or other";
static char *kwlist[] = {"bar", "baz", NULL};
if (!PyArg_ParseTupleAndKeywords(args, keywds, "s|s", kwlist,
&bar, &baz))
return NULL;
printf("%s %s\n", bar, baz);
Py_INCREF(Py_None);
return Py_None;
}
static PyMethodDef themodule_methods[] = {
{"foo", (PyCFunction)themodule_foo, METH_VARARGS | METH_KEYWORDS,
"Print some greeting to standard output."},
{NULL, NULL, 0, NULL} /* sentinel */
};
void
initthemodule(void)
{
Py_InitModule("themodule", themodule_methods);
}
