Iterates the set members in :prop:key_prefix of :prop:_client
            @match: #str pattern to match items by
            @count: the user specified the amount of work that should be done
                at every call in order to retrieve elements from the collection

            -> yields members of the set

def iter(self, match="*", count=1000):
        """ Iterates the set members in :prop:key_prefix of :prop:_client
            @match: #str pattern to match items by
            @count: the user specified the amount of work that should be done
                at every call in order to retrieve elements from the collection

            -> yields members of the set
        """
        _loads = self._loads
        for m in self._client.sscan_iter(
           self.key_prefix, match="*", count=count):
            yield _loads(m)