Issue 19933: Provide default argument for ndigits in round. Patch by Vajrasky Kok.
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index 1d369f9..d681981 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -986,8 +986,9 @@
x = PyFloat_AsDouble(v);
if (!PyArg_ParseTuple(args, "|O", &o_ndigits))
return NULL;
- if (o_ndigits == NULL) {
- /* single-argument round: round to nearest integer */
+ if (o_ndigits == NULL || o_ndigits == Py_None) {
+ /* single-argument round or with None ndigits:
+ * round to nearest integer */
rounded = round(x);
if (fabs(x-rounded) == 0.5)
/* halfway case: round to even */