Try complex.i: compiles, doesn't work

python/libcerf.i

 %module "libcerf"
 
-/* Convert from Python --> C */
-%typemap(in) _cerf_cmplx {
-    $1 = ((Py_complex*)$input)->real + _Complex_I * ((Py_complex*)$input)->imag;
-}
-
-/* Convert from C --> Python */
-%typemap(out) int {
-    $result =  Py_complex(creal($1), cimag($1));
-}
-
 %{
 #include "lib/cerf.h"
 %}
 
+%include <complex.i>
 %include "lib/cerf.h"