code: def release_address(self, address):
          
          query = self.query_factory(
              action="ReleaseAddress", creds=self.creds, endpoint=self.endpoint,
              other_params={"PublicIp": address})
          d = query.submit()
          return d.addCallback(self.parser.truth_return)
docs: Release a previously allocated address returned by C{allocate_address}.
  
          @return: C{True} if the operation succeeded.