SF patch 1631942 by Collin Winter:
(a) "except E, V" -> "except E as V"
(b) V is now limited to a simple name (local variable)
(c) V is now deleted at the end of the except block
diff --git a/Lib/test/test_file.py b/Lib/test/test_file.py
index 234920d..52c4a02 100644
--- a/Lib/test/test_file.py
+++ b/Lib/test/test_file.py
@@ -159,7 +159,7 @@
         bad_mode = "qwerty"
         try:
             f = open(TESTFN, bad_mode)
-        except ValueError, msg:
+        except ValueError as msg:
             if msg[0] != 0:
                 s = str(msg)
                 if s.find(TESTFN) != -1 or s.find(bad_mode) == -1:
@@ -183,7 +183,7 @@
                 d = int(f.read())
                 f.close()
                 f.close()
-            except IOError, msg:
+            except IOError as msg:
                 self.fail('error setting buffer size %d: %s' % (s, str(msg)))
             self.assertEquals(d, s)