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

Mac/scripts/buildpkg.py

@@ -451,7 +451,7 @@ def main():
 
     try:
         opts, args = getopt.getopt(sys.argv[1:], shortOpts, longOpts)
-    except getopt.GetoptError, details:
+    except getopt.GetoptError as details:
         print details
         printUsage()
         return