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Author: donbarbos

Objects/abstract.c

@@ -145,7 +145,7 @@ PyObject_LengthHint(PyObject *o, Py_ssize_t defaultvalue)
     }
     if (res < 0) {
         PyErr_Format(PyExc_ValueError,
-                     "%T.__length_hint__() must return a positive int", o);
+                     "%T.__length_hint__() must return a non-negative int", o);
         return -1;
     }
     return res;
@@ -2817,7 +2817,7 @@ PyObject_GetIter(PyObject *o)
         PyObject *res = (*f)(o);
         if (res != NULL && !PyIter_Check(res)) {
             PyErr_Format(PyExc_TypeError,
-                         "%T.iter() must return an iterator, not %T",
+                         "%T.__iter__() must return an iterator, not %T",
                          o, res);
             Py_SETREF(res, NULL);
         }
@@ -2837,7 +2837,7 @@ PyObject_GetAIter(PyObject *o) {
     PyObject *it = (*f)(o);
     if (it != NULL && !PyAIter_Check(it)) {
         PyErr_Format(PyExc_TypeError,
-                     "%T.aiter() must return an async iterator, not %T",
+                     "%T.__aiter__() must return an async iterator, not %T",
                      o, it);
         Py_SETREF(it, NULL);
     }

Objects/typeobject.c

@@ -3508,17 +3508,16 @@ mro_check(PyTypeObject *type, PyObject *mro)
         PyObject *obj = PyTuple_GET_ITEM(mro, i);
         if (!PyType_Check(obj)) {
             PyErr_Format(PyExc_TypeError,
-                         "%s.mro() returned a non-class ('%T')",
-                         type->tp_name, obj);
+                         "%N.mro() returned a non-class ('%T')", type, obj);
             return -1;
         }
         PyTypeObject *base = (PyTypeObject*)obj;
 
         if (!is_subtype_with_mro(lookup_tp_mro(solid), solid, solid_base(base))) {
             PyErr_Format(
                 PyExc_TypeError,
-                "%s.mro() returned base with unsuitable layout ('%.500s')",
-                type->tp_name, base->tp_name);
+                "%N.mro() returned base with unsuitable layout ('%.500s')",
+                type, base->tp_name);
             return -1;
         }
     }