What are the methods for operating redis in python?
Python operates redis and uses connection pool:
redis-py uses connection pool to manage all connections to a redis server to avoid the overhead of establishing and releasing connections each time. By default, each Redis instance maintains its own connection pool. You can directly establish a connection pool and then use it as parameter Redis, so that multiple Redis instances can share a connection pool.
def getcoon(): pool = redis.ConnectionPool(host='192.168.25.126', port=6379, password='123456', db=0) coon = redis.Redis(connection_pool=pool) coon.set('key', 'value') res = coon.get('key') return res
coon.set('sea', 'hahhahaha', ex=30) # 过期时间单位s
set(name, value, ex=None, px=None, nx=False, xx=False) 在 Redis 中设置值,默认,不存在则创建,存在则修改。 参数: ex - 过期时间(秒) px - 过期时间(毫秒) nx - 如果设置为True,则只有name不存在时,当前set操作才执行 xx - 如果设置为True,则只有name存在时,当前set操作才执行
redis uses connection pool operation
class OPRedis(object): def __init__(self): if not hasattr(OPRedis, 'pool'): OPRedis.getRedisCoon() #创建redis连接 self.coon = redis.Redis(connection_pool=OPRedis.pool) @staticmethod def getRedisCoon(): OPRedis.pool = redis.ConnectionPool(host=redisInfo['host'], password=redisInfo['password'], port=redisInfo['port'], db=redisInfo['db']) """ string类型 {'key':'value'} redis操作 """ def setredis(self, key, value, time=None): #非空即真非0即真 if time: res = self.coon.setex(key, value, time) else: res = self.coon.set(key, value) return res def getRedis(self, key): res = self.coon.get(key).decode() return res def delRedis(self, key): res = self.coon.delete(key) return res """ hash类型,{'name':{'key':'value'}} redis操作 """ def setHashRedis(self, name, key, value): res = self.coon.hset(name, key, value) return res def getHashRedis(self, name, key=None): # 判断key是否我为空,不为空,获取指定name内的某个key的value; 为空则获取name对应的所有value if key: res = self.coon.hget(name, key) else: res = self.coon.hgetall(name) return res def delHashRedis(self, name, key=None): if key: res = self.coon.hdel(name, key) else: res = self.coon.delete(name) return res
redisInfo configuration
redisInfo = { "host": '192.168.1.112', "password": '123456', "port": 6379, "db": 0 }
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