--- a   2011-07-06 15:13:22.806839373 -0700
+++ b   2011-07-06 15:12:42.690701304 -0700
@@ -1,6 +1,7 @@
 #! /usr/bin/env python
 __doc__ = """
 example of cascading options with ConfigParser and OptionParser
+from : http://thoughtsbyclayg.blogspot.com/2009/10/python-over-riding-options-with.html
 """

 # imports
@@ -33,18 +34,17 @@
     # read config objects defaults section into a dictionary
     config_options = config.defaults()
     # config_options is dictionary of strings, over-ride toggle to bool
-    config_options['toggle'] = config.getboolean('DEFAULT', 'toggle')
+    for dest in [option.dest for option in parser.option_list if option.action.lower() in ('store_true', 'store_false')]:
+        if config.has_option('DEFAULT', dest) and not isinstance(config_options[dest], bool):
+            config_options[dest] = config.getboolean('DEFAULT',dest)
+
     # feed dictionary of defaults into parser object
     parser.set_defaults(**config_options)

     # parse command line options
     (options, args) = parser.parse_args()

-    print "option: %s" % options.option
-    if options.toggle:
-        print "toggle is ON"
-    else:
-        print "toggle is OFF"
+    print parser.values

     return 0;