封装redis

import redis

# r = redis.Redis()
class MyRedis():
    def __init__(self,ip,password,port=6379,db=0):
        #构造函数
        try:
            self.r = redis.Redis(host=ip,password=password,port=port,db=db)
            # r = redis.ConnectionPool(host=ip,password=password,port=port,db=db)
        except Exception as e:
            print(‘redis连接失败，错误信息%s‘%e)
    def str_get(self,k):
        res = self.r.get(k)
        if res:
            return res.decode()#获取数据要有返回值，所以要有返回值
    def str_set(self,k,v,time=None):
        self.r.set(k,v,time)
    def delete(self,k):
        tag = self.r.exists(k) #判断这个key是否存在
        if tag:
            self.r.delete(k)
            print(‘删除成功‘)
        else:
            print(‘这个key不存在‘)
    def hash_get(self,name,k): #无论key是否存在，都不会报错，所以不用写try
        res = self.r.hget(name,k)
        if res:
            return res.decode()
    def hash_set(self,name,k,v):
        self.r.hset(name,k,v)
    def hash_getall(self,name):
        data = {}
        # {b‘12‘: b‘1212‘, b‘3‘: b‘sdad‘, b‘4‘: b‘asdadsa‘}
        res = self.r.hgetall(name)
        if res:
            for k,v in res.items():
                k =  k.decode()
                v = v.decode()
                data[k]=v
        return data
    def hash_del(self,name,k):
        res = self.r.hdel(name,k)
        if res:#因为删除成功会返回1，删除失败返回0
            print(‘删除成功‘)
            return 1
        else:
            print(‘删除失败，该key不存在‘)
            return 0

    @property#定义为属性方法，以后可以直接调用
    def clean_redis(self):
        self.r.flushdb()  #清1空redis
        print(‘清空redis成功！‘)
        return 0