Deletes @keys from :prop:_client
            @*keys: keys to remove

            -> #int the number of keys that were removed

def remove(self, *keys):
        """ Deletes @keys from :prop:_client
            @*keys: keys to remove

            -> #int the number of keys that were removed
        """
        keys = list(map(self.get_key, keys))
        return self._client.delete(*keys)