redis 常用操作

redis 取值decode
version = rds_extra.get("ddz_42112048_version").decode()

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"

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