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

Tools/scripts/byteyears.py

@@ -43,7 +43,7 @@ def main():
     for filename in sys.argv[1:]:
         try:
             st = statfunc(filename)
-        except os.error, msg:
+        except os.error as msg:
             sys.stderr.write("can't stat %r: %r\n" % (filename, msg))
             status = 1
             st = ()