code: def dumps(self, format="local"):
          
          if format == "local":
              res = EntitiesDescriptor()
              for _md in self.metadata.values():
                  try:
                      res.entity_descriptor.extend(
                          _md.entities_descr.entity_descriptor)
                  except AttributeError:
                      res.entity_descriptor.append(_md.entity_descr)
  
              return "%s" % res
          elif format == "md":
              return json.dumps(self.items(), indent=2)
docs: Dumps the content in standard metadata format or the pysaml2 metadata
          format
  
          :param format: Which format to dump in
          :return: a string