code: def _create_client(self, clt_class, url, public=True, special=False):
          
          if self.service == "compute" and not special:
              # Novaclient requires different parameters.
              client = pyrax.connect_to_cloudservers(region=self.region,
                      context=self.identity, verify_ssl=self.verify_ssl)
              client.identity = self.identity
          else:
              client = clt_class(self.identity, region_name=self.region,
                      management_url=url, verify_ssl=self.verify_ssl)
          return client
docs: Creates a client instance for the service.