def sdiffstore(self, dest, *keys):
keys = [self.redis_key(k) for k in self._parse_values(keys)]<EOL>with self.pipe as pipe:<EOL><INDENT>return pipe.sdiffstore(self.redis_key(dest), *keys)<EOL><DEDENT>
Store the difference of sets specified by ``keys`` into a new
set named ``dest``.  Returns the number of keys in the new set.