bpo-37108: Support super with methods that use positional-only arguments (GH-13695)

pablogsal · web-flow · commit 3a46d5c293d3 · 2019-05-31T12:07:56.000+01:00
diff --git a/Lib/test/test_positional_only_arg.py b/Lib/test/test_positional_only_arg.py
@@ -398,6 +398,20 @@ def f(a=1, /, b=2):
         gen = f()
         self.assertEqual(next(gen), (1, 2))
 
+    def test_super(self):
+
+        sentinel = object()
+
+        class A:
+            def method(self):
+                return sentinel
+
+        class C(A):
+            def method(self, /):
+                return super().method()
+
+        self.assertEqual(C().method(), sentinel)
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
@@ -7807,7 +7807,7 @@ super_init(PyObject *self, PyObject *args, PyObject *kwds)
                             "super(): no code object");
             return -1;
         }
-        if (co->co_argcount == 0) {
+        if (co->co_posonlyargcount + co->co_argcount == 0) {
             PyErr_SetString(PyExc_RuntimeError,
                             "super(): no arguments");
             return -1;

Original file line number	Diff line number	Diff line change
`@@ -7807,7 +7807,7 @@ super_init(PyObject self, PyObject args, PyObject *kwds)`
`7807`	`7807`	`"super(): no code object");`
`7808`	`7808`	`return -1;`
`7809`	`7809`	`}`
`7810`		`- if (co->co_argcount == 0) {`
	`7810`	`+ if (co->co_posonlyargcount + co->co_argcount == 0) {`
`7811`	`7811`	`PyErr_SetString(PyExc_RuntimeError,`
`7812`	`7812`	`"super(): no arguments");`
`7813`	`7813`	`return -1;`