diff -r 9beeb4c1375d Lib/optparse.py
--- a/Lib/optparse.py   Sat Oct 31 13:07:44 2015 -0700
+++ b/Lib/optparse.py   Sat Oct 31 17:07:23 2015 -0400
@@ -74,6 +74,11 @@
 
 import sys, os
 import textwrap
+import warnings
+
+warnings.warn("The optparse module is deprecated and will not be developed "
+              "further; development will continue with the argparse module.",
+              DeprecationWarning, stacklevel=2)
 
 def _repr(self):
     return "<%s at 0x%x: %s>" % (self.__class__.__name__, id(self), self)