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/Tools/unicode/comparecodecs.py b/Tools/unicode/comparecodecs.py
index cd417a4..a293283 100644
--- a/Tools/unicode/comparecodecs.py
+++ b/Tools/unicode/comparecodecs.py
@@ -18,11 +18,11 @@
         u = unichr(i)
         try:
             c1 = u.encode(encoding1)
-        except UnicodeError, reason:
+        except UnicodeError as reason:
             c1 = '<undefined>'
         try:
             c2 = u.encode(encoding2)
-        except UnicodeError, reason:
+        except UnicodeError as reason:
             c2 = '<undefined>'
         if c1 != c2:
             print ' * encoding mismatch for 0x%04X: %-14r != %r' % \