redis在python中的應用

Redis經常使用的數據結構

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• string

最簡單的結構，key-value形式

• list

一個key對應一個鏈表

• hash:

記錄一個對象

• set

無重複的數據集合

• sorted set (zset)

有序無重複的數據集合

在python中的應用

redis會默認生成0-15的庫，推薦使用StrictRedis鏈接方式

import redis
pool = redis.ConnectionPool(host='localhost', port= 6379, db= 0)
client = redis.StrictRedis(connection_pool=pool)

統一操做

client.exists(key) #是否存在key
client.delete(key) #刪除key
client.type(key) #返回key類型
client.keys(pattern) #返回匹配pattern的key
client.randomkey() #隨機返回一個key
client.rename(key1, key2) #更改key1名字爲key2
client.dbsize() #當前庫中key數量
client.expire(key, time) #設置key存在時間
client.ttl(key) #獲取key的存在時間
client.flushdb() #刪除當前庫中全部key
client.flushall() #刪除全部庫中的全部key

string類型操做

client.set(key, val)
client.get(key)
client.getset(key, val) #返回舊value
client.mget(key1, key2, ...) #返回多個key的val
client.setnx(key, value) #設置不存在的key
client.setex(key, time, value)
client.mset(key1, value1, key2, value2,...)#批量設置key,value
client.msetnx(key, value, key1,value1)
client.incr(key) # value + 1
client.incrby(key,integer) # value + integer
client.decr(key) # value - 1
client.decrby(key, integer) #value - integer
client.appent(key, value) #附加value
client.substr(key, start, end) #返回子串

list類型操做

client.rpush(key, value) #尾部添加
client.lpush(key, value) #頭部添加
client.llen(key) #長度
client.lrange(key, start, end) #
client.ltrim(key, start, end)
client.lindex(key, index)
client.lset(key, index, value)
client.lrem(key, count, value)
client.lpop(key)
client.rpop(key)
client.blpop(key1, key2, ...)
client.brpop(key1, key2, ...)
client.rpoplpush(srckey, dstkey)

set類型操做

client.sadd(key, value)
client.srem(key, value)
client.spop(key)
client.smove(skey, dkey, value)
client.scard(key)
client.sismember(key, member)
client.sinter(key1, key2,...)
client.sinterstore(dstkey, key1, key2, ...)
client.sunion(key1, key2, ...)
client.sunionstore(dstkey, key1, key2, ...)
client.sdiff(key1, key2, ...)
client.sdiffstore(dstkey, key1, key2, ...)
client.smembers(key)
client.srandmember(key)

zset類型操做

client.zadd(key, score, value)
client.zrem(key,value)
client.zincrby(key, increment, member)
client.zrank(key, value)
client.zrevrank(key, value)
client.zrange(key, start, end)
client.zrevrange(key, start, end)
client.zrangebyscore(key, min, max)
client.zcard(key)
client.zscore(key, element)
client.zremrangebyrank(key, min, max)
client.zremrangebyscore(key, min, max)
client.zunionstore(dstkeyN, key1,…,keyN, WEIGHTS w1,…wN, AGGREGATE SUM|MIN|MAX)

hash類型操做

client.hset(key, field, value)
client.hget(key, field)
client.hmget(key, field1, …,field N)
client.hmset(key, field1, value1,…,field N, value N)
client.hincrby(key, field, integer)
client.hexists(key, field)
client.hdel(key, field)
client.hlen(key)
client.hkeys(key)
client.hvals(key)
client.hgetall(key)