code: func (r *Redis) Get(key string) interface{} {
  	conn := r.conn.Get()
  	defer conn.Close()
  
  	var data []byte
  	var err error
  	if data, err = redis.Bytes(conn.Do("GET", key)); err != nil {
  		return nil
  	}
  	var reply interface{}
  	if err = json.Unmarshal(data, &reply); err != nil {
  		return nil
  	}
  
  	return reply
  }
docs: //Get 获取一个值