redis 常用操作
redis 取值decode
version = rds_extra.get("ddz_42112048_version").decode()
删除所有key
删除当前数据库中的所有Key flushdb //删除所有数据库中的key flushall
模糊删除
>>> import redis >>> r = redis.StrictRedis(host='localhost', port=6379, db=0) >>> r.delete(*r.keys('*test*')) rds_mongo.delete(*rds_mongo.keys('*UserDayStat{}*'.format(device_id)))
1.链接redis
2.keys * 获取所有key
127.0.0.1:6379[5]> keys * 1) "UserDayStat|4793799761@2019-07-08" 2) "UserWeekStat|4865137051@2019-07-07" 3) "UserGameStat|4795903911@173991"
3.keys *进行模糊匹配*
127.0.0.1:6379[5]> keys *2019-07-07* 1) "UserWeekStat|4865137051@2019-07-07" 2) "UserWeekStat|4793799761@2019-07-07" 3) "UserWeekStat|4795903911@2019-07-07"
4. incr "a_test" rds_extra.incr(key) redis计数器 如果不存在key为1 存在+1 计数器
127.0.0.1:6379[5]> INCR "a_test" (integer) 5 127.0.0.1:6379[5]> get "a_test" "5" 127.0.0.1:6379[5]> INCR "a_test" (integer) 6 127.0.0.1:6379[5]> get "a_test" "6"
5.expire 设置过期时间 设置过期时间为10秒
127.0.0.1:6379[5]> EXPIRE a_test 10 (integer) 1 127.0.0.1:6379[5]> get a_test
6.hmset 设置key对应的dict
127.0.0.1:6379[5]> HMSET test_dict t1 "h1" t2 "h3" OK 127.0.0.1:6379[5]> hget test_dict t1 "h1" 127.0.0.1:6379[5]> hget test_dict t2 "h3"
7.hgetall 获取key对应的所有值为dict 遍历
127.0.0.1:6379[5]> HMSET test_dict t1 "h1" t2 "h3" t3 "h4" OK 127.0.0.1:6379[5]> HGETALL test_dict 1) "t1" 2) "h1" 3) "t2" 4) "h3" 5) "t3" 6) "h4"
8 setex 命令为指定的 key 设置值及其过期时间。如果 key 已经存在，setex 命令将会替换旧的值。
加锁
setnx 设置锁 命令在设置成功时返回 1 ， 设置失败时返回 0
127.0.0.1:6379[5]> SETEX test_dict 10 t1 OK 127.0.0.1:6379[5]> HGET test_dict t1 (nil)
redis> EXISTS job # job 不存在
(integer) 0
redis> SETNX job "programmer" # job 设置成功
(integer) 1
redis> SETNX job "code-farmer" # 尝试覆盖 job ，失败
(integer) 0
redis> GET job # 没有被覆盖
"programmer"
9 del删除key
127.0.0.1:6379[5]> set cccc 10 OK 127.0.0.1:6379[5]> get cccc "10" 127.0.0.1:6379[5]> del cccc (integer) 1 127.0.0.1:6379[5]> get cccc (nil)
10 lpush 命令将一个或多个值插入到列表头部 列表插入值 从左插入
127.0.0.1:6379[3]> LPUSH test_1_list [1,2,3,4,4,5,6,76,7] (integer) 14 127.0.0.1:6379[3]> LTRIM test_1_list 0 9 OK 127.0.0.1:6379[3]> LRANGE test_1_list 0 9 1) "[1,2,3,4,4,5,6,76,7]" 2) "[1,2,3,4,4,5,6,76,7]" 3) "[1,2,3,4,4,5,6,76,7]" 4) "[1,2,3,4,4,5,6,76,7]" 5) "[1,2,3,4,4,5,6,76,7]" 6) "[1,2,3,4,4,5,6,76,7]" 7) "[1,2,3,4,4,5,6,76,7]" 8) "[1,2,3,4,4,5,6,76,7]" 9) "[1,2,3,4,4,5,6,76,7]" 10) "[1,2,3,4,4,5,6,76,7]"
11 zadd 添加一个有序集合 key唯一不重复 zscore 返回 对应key 的成员，或 key 不存在，返回 nil
zrevrangebyscore 有序集合递减排序 zrevrange 根据 value的值进行排名 zrevrank 返回对应key的排名
zincrby 命令对有序集合中指定成员的分数加上增量 increment 负数为减
127.0.0.1:6379[5]> zadd test 2 apple2 3 apple3 4 apple4 (integer) 1 127.0.0.1:6379[5]> ZRANGE test 0 10 WITHSCORES 1) "apple1" 2) "1" 3) "apple2" 4) "2" 5) "apple3" 6) "3" 7) "apple4" 8) "4" # 获取值 zscore 127.0.0.1:6379[5]> ZSCORE test apple1 "3" # 有序集合递减排序 ZREVRANGEBYSCORE 127.0.0.1:6379[5]> ZADD salary 5000 tom (integer) 0 127.0.0.1:6379[5]> ZADD salary 7500 peter (integer) 0 127.0.0.1:6379[5]> zadd salary 3500 joe (integer) 0 127.0.0.1:6379[5]> ZREVRANGEBYSCORE salary 10000 2000 1) "peter" 2) "tom" 3) "joe" # zrevrange 根据value的值排名 0-5 前5名 127.0.0.1:6379[5]> zrevrange salary 0 5 1) "jie" 2) "jack" 3) "peter" 4) "tom" 5) "joe" 6) "yingjie" # zrevrank 返回对应key排名 127.0.0.1:6379[5]> zrevrank salary tom (integer) 3 # zincrby 对指定的key 相加 负数为相减 127.0.0.1:6379[5]> zincrby salary 20000 yingjie "21200" 127.0.0.1:6379[5]> zrevrange salary 0 5 1) "yingjie" 2) "jie" 3) "jack" 4) "peter" 5) "tom" 6) "joe" #获取某个人的排名 ZREVRANK T0_room 1250571556 # 获取集合人数 zcard T0_room # redis 查询有序集合所有人成绩 ZRANGE T0|room 0 -1 WITHSCORES
redis 设置字符串
rds_con_game.set(name=rds_key, value=1) # 设置值
rds_con_game.expire(name=rds_key, time=86400 - seconds) #设置过期时间
rds_con_game.get(name=rds_key) # 获取值
