def spop(self, name):
        """Emulate spop."""
        redis_set = self._get_set(name, 'SPOP')
        if not redis_set:
            return None
        member = choice(list(redis_set))
        redis_set.remove(member)
        if len(redis_set) == 0:
            self.delete(name)
        return member
Emulate spop.