python操作redis的方法
本文实例讲述了python操作redis的方法。分享给大家供大家参考。具体如下:
#!/usr/bin/python #coding=utf-8 import redis class CRedis: def __init__(self): self.host = 'localhost' self.port = 6379 self.db = 0 self.r = redis.Redis(host = self.host, port = self.port, db = self.db) #1. strings 类型及操作 #设置 key 对应的值为 string 类型的 value def set(self, key, value): return self.r.set(key, value) #设置 key 对应的值为 string 类型的 value。如果 key 已经存在,返回 0,nx 是 not exist 的意思 def setnx(self, key, value): return self.r.setnx(key, value) #设置 key 对应的值为 string 类型的 value,并指定此键值对应的有效期 def setex(self, key, time, value): return self.r.setex(key, time, value) #设置指定 key 的 value 值的子字符串 #setrange name 8 gmail.com #其中的 8 是指从下标为 8(包含 8)的字符开始替换 def setrange(self, key, num, value): return self.r.setrange(key, num, value) #获取指定 key 的 value 值的子字符串 def getrange(self, key, start ,end): return self.r.getrange(key, start, end) #mget(list) def get(self, key): if isinstance(key, list): return self.r.mget(key) else: return self.r.get(key) #删除 def remove(self, key): return self.r.delete(key) #自增 def incr(self, key, default = 1): if (1 == default): return self.r.incr(key) else: return self.r.incr(key, default) #自减 def decr(self, key, default = 1): if (1 == default): return self.r.decr(key) else: return self.r.decr(key, default) #2. hashes 类型及操作 #根据email获取session信息 def hget(self, email): return self.r.hget('session', email) #以email作为唯一标识,增加用户session def hset(self, email, content): return self.r.hset('session', email, content) #获取session哈希表中的所有数据 def hgetall(self): return self.r.hgetall('session') #删除hashes def hdel(self, name, key = None): if(key): return self.r.hdel(name, key) return self.r.hdel(name) #清空当前db def clear(self): return self.r.flushdb() #3、lists 类型及操作 #适合做邮件队列 #在 key 对应 list 的头部添加字符串元素 def lpush(self, key ,value): return self.r.lpush(key, value) #从 list 的尾部删除元素,并返回删除元素 def lpop(self, key): return self.r.plush(key) if __name__ == '__main__': r = CRedis()
希望本文所述对大家的Python程序设计有所帮助。

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