--- /usr/lib/python2.6/optparse.py	2009-04-18 22:43:42.000000000 -0400
+++ myoptparse.py	2009-07-21 18:02:50.000000000 -0400
@@ -81,7 +81,7 @@
 _ = gettext
 
 
-class OptParseError (Exception):
+class OptParseError(Exception):
     def __init__(self, msg):
         self.msg = msg
 
@@ -89,7 +89,7 @@
         return self.msg
 
 
-class OptionError (OptParseError):
+class OptionError(OptParseError):
     """
     Raised if an Option instance is created with invalid or
     inconsistent arguments.
@@ -105,18 +105,18 @@
         else:
             return self.msg
 
-class OptionConflictError (OptionError):
+class OptionConflictError(OptionError):
     """
     Raised if conflicting options are added to an OptionParser.
     """
 
-class OptionValueError (OptParseError):
+class OptionValueError(OptParseError):
     """
     Raised if an invalid option value is encountered on the command
     line.
     """
 
-class BadOptionError (OptParseError):
+class BadOptionError(OptParseError):
     """
     Raised if an invalid option is seen on the command line.
     """
@@ -126,7 +126,7 @@
     def __str__(self):
         return _("no such option: %s") % self.opt_str
 
-class AmbiguousOptionError (BadOptionError):
+class AmbiguousOptionError(BadOptionError):
     """
     Raised if an ambiguous option is seen on the command line.
     """
@@ -139,7 +139,7 @@
                 % (self.opt_str, ", ".join(self.possibilities)))
 
 
-class HelpFormatter:
+class HelpFormatter(object):
 
     """
     Abstract base class for formatting option help.  OptionParser
@@ -345,7 +345,7 @@
 
         return ", ".join(opts)
 
-class IndentedHelpFormatter (HelpFormatter):
+class IndentedHelpFormatter(HelpFormatter):
     """Format help with indented section bodies.
     """
 
@@ -364,7 +364,7 @@
         return "%*s%s:\n" % (self.current_indent, "", heading)
 
 
-class TitledHelpFormatter (HelpFormatter):
+class TitledHelpFormatter(HelpFormatter):
     """Format help with underlined section headers.
     """
 
@@ -429,7 +429,7 @@
 NO_DEFAULT = ("NO", "DEFAULT")
 
 
-class Option:
+class Option(object):
     """
     Instance attributes:
       _short_opts : [string]
@@ -462,7 +462,8 @@
              'callback_args',
              'callback_kwargs',
              'help',
-             'metavar']
+             'metavar',
+             'required']
 
     # The set of actions allowed by option parsers.  Explicitly listed
     # here so the constructor can validate its arguments.
@@ -719,6 +720,13 @@
                 raise OptionError(
                     "callback_kwargs supplied for non-callback option", self)
 
+    def _check_required(self):
+        if self.required and not self.takes_value():
+            raise OptionError("required flag set for option that doesn't take a value", self)
+        print self.dest, self.default
+        if self.required and self.default != ('NO', 'DEFAULT'):
+            raise OptionError("required flag set for option that has default value", self)
+
 
     CHECK_METHODS = [_check_action,
                      _check_type,
@@ -726,7 +734,8 @@
                      _check_dest,
                      _check_const,
                      _check_nargs,
-                     _check_callback]
+                     _check_callback,
+                     _check_required]
 
 
     # -- Miscellaneous methods -----------------------------------------
@@ -763,6 +772,7 @@
                 return tuple([self.check_value(opt, v) for v in value])
 
     def process(self, opt, value, values, parser):
+        parser.option_seen[self] = 1
 
         # First, convert the value(s) to the right type.  Howl if any
         # value(s) are bogus.
@@ -819,7 +829,7 @@
     def isbasestring(x):
         return isinstance(x, basestring)
 
-class Values:
+class Values(object):
 
     def __init__(self, defaults=None):
         if defaults:
@@ -884,7 +894,7 @@
         return getattr(self, attr)
 
 
-class OptionContainer:
+class OptionContainer(object):
 
     """
     Abstract base class.
@@ -1072,7 +1082,7 @@
         return "\n".join(result)
 
 
-class OptionGroup (OptionContainer):
+class OptionGroup(OptionContainer):
 
     def __init__(self, parser, title, description=None):
         self.parser = parser
@@ -1102,7 +1112,7 @@
         return result
 
 
-class OptionParser (OptionContainer):
+class OptionParser(OptionContainer):
 
     """
     Class attributes:
@@ -1251,6 +1261,7 @@
         self.rargs = None
         self.largs = None
         self.values = None
+        self.option_seen = {}
 
 
     # -- Simple modifier methods ---------------------------------------
@@ -1393,9 +1404,11 @@
         Check that the supplied option values and leftover arguments are
         valid.  Returns the option values and leftover arguments
         (possibly adjusted, possibly completely new -- whatever you
-        like).  Default implementation just returns the passed-in
-        values; subclasses may override as desired.
+        like).
         """
+        for option in self.option_list + sum((optiongroup.option_list for optiongroup in self.option_groups), []):
+                if isinstance(option, Option) and option.required and not self.option_seen.has_key(option):
+                        self.error("%s not supplied" % (option, ))
         return (values, args)
 
     def _process_args(self, largs, rargs, values):