Get Default value for a given (section, option)
        -> useful for type checking in 'get' method

def get_default(self, section, option):
        """
        Get Default value for a given (section, option)
        -> useful for type checking in 'get' method
        """
        section = self._check_section_option(section, option)
        for sec, options in self.defaults:
            if sec == section:
                if option in options:
                    return options[ option ]
        else:
            return NoDefault