From aee2d5f975dfa53fb270439d9e09d542d8ea765f Mon Sep 17 00:00:00 2001
From: Thomas Heller <theller@ctypes.org>
Date: Wed, 5 Jun 2002 12:55:19 +0000
Subject: [PATCH] Better isinstance error message.

Closes SF patch # 560250.

Bugfix candidate IMO.
---
 Objects/abstract.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Objects/abstract.c b/Objects/abstract.c
index d10d9d4b0ca..917195a200b 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -1976,7 +1976,8 @@ PyObject_IsInstance(PyObject *inst, PyObject *cls)
 			/* Do not mask errors. */
 			if (!PyErr_Occurred())
 				PyErr_SetString(PyExc_TypeError,
-				"isinstance() arg 2 must be a class or type");
+				"isinstance() arg 2 must be a class, type,"
+				" or tuple of classes and types");
 			return -1;
 		}
 		Py_DECREF(cls_bases);