python redis 有序集合sorted set检查某个键是否存在

redis有序集合(Sorted Set)命令html

ZADD
ZREM
ZCARD
ZCOUNT
ZSCORE
ZINCRBY
ZRANGE
ZREVRANGE
ZRANGEBYSCORE
ZREVRANGEBYSCORE
ZRANK
ZREVRANK
ZREMRANGEBYRANK
ZREMRANGEBYSCORE
ZINTERSTORE
ZUNIONSTORE

从上面命令中看到, redis的有序集合(Sorted Set)没有命令判断键是否存在于有序集合中。python

通过一番研究,能够经过zrank()方法来解决。redis

zrank post

功能:返回有序集中指定成员的排名。spa

命令基本语法以下:code

redis 127.0.0.1:6379> ZRANK key member

 

demohtm

>> ZRANGE salary 0 -1 WITHSCORES        # 显示全部成员及其 score 值
1) "peter"
2) "3500"
3) "tom"
4) "4000"
5) "jack"
6) "5000"

>> ZRANK salary tom (integer) 1

>> ZRANK salary linly (None)

 

相关代码blog

from redis import Redis conn=Redis() def zexist(self, name, value): if conn.zrank(name, value): return True return False

python redis 有序集合sorted set检查某个键是否存在get

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