SF bug #543387.

Complex numbers implement divmod() and //, neither of which makes one
lick of sense.  Unfortunately this is documented, so I'm adding a
deprecation warning now, so we can delete this silliness, oh, around
2005 or so.

Bugfix candidate (At least for 2.2.2, I think.)

Objects/complexobject.c

@@ -418,6 +418,11 @@ complex_divmod(PyComplexObject *v, PyComplexObject *w)
 {
         Py_complex div, mod;
 	PyObject *d, *m, *z;
+
+	if (PyErr_Warn(PyExc_DeprecationWarning,
+		       "complex divmod() and // are deprecated") < 0)
+		return NULL;
+
 	errno = 0;
 	div = c_quot(v->cval,w->cval); /* The raw divisor value. */
 	if (errno == EDOM) {