code: def get_default(self, section, option):
          
          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
docs: Get Default value for a given (section, option)
          -> useful for type checking in 'get' method