python操作redis

直接上代码：（带认证密码的redis连接）

# 1、带认证密码。普通方式连接
import redis

HOST = '192.168.1.123'
PORT = '6379'
POOL_NAME = 'redis_pool'
PASSWORD = "123456"

r = redis.StrictRedis(host=HOST, port=PORT, db=0, password=PASSWORD)
r.set("foo", "bar")
print(r.get("foo"))


# 2、带认证密码。连接池方式连接
import redis

HOST = '192.168.1.123'
PORT = '6379'
POOL_NAME = 'redis_pool'
PASSWORD = "123456"
pool = redis.ConnectionPool(host=HOST, port=PORT, db=0, password=PASSWORD)
r = redis.Redis(connection_pool=pool)
r.set('name', 'andy8888')
print(r.get('name'))

　　

 

安装redis

启动redis服务

安装python的支持包

用python代码操作redis

import redis
r = redis.StrictRedis(host="localhost", port=6379, db=0)
r.set("foo", "bar")
print(r.get("foo"))

　　

redis连接池
Redis 的连接池是多线程安全的、多进程安全的、自动重连的。
连接池的作用是当前连接断掉了自动重连。
你可以不用自己手动使用连接池。

不知道连接池之前：
redis使用的方法：

r=redis.StrictRedis(host=xxxx, port=xxxx, db=xxxx)
r.xxxx()

　　

有了ConnectionPool这个类之后，可以使用如下方法

pool = redis.ConnectionPool(host=xxx, port=xxx, db=xxxx)
r = redis.Redis(connection_pool=pool)

　　这里Redis是StrictRedis的子类

推荐书写格式：常量-》代码

import redis

# Redis Host
REDIS_HOST = 'localhost'
# Redis PORT
REDIS_PORT = 6379
# 第几个redis库
REDIS_DB=0

# r = redis.StrictRedis(host=REDIS_HOST, port=REDIS_PORT, db=REDIS_DB)
# r.set("foo", "bar2")
# print(r.get("foo"))

pool = redis.ConnectionPool(host=REDIS_HOST, port=REDIS_PORT, db=REDIS_DB)
r = redis.Redis(connection_pool=pool)
r.set('name','andy8888')
print(r.get('name'))

　　

一个redis操作案例：读取文件数据，写入redis中

1.txt

a,b,c,d,mmm
1,2,3,4,55
aaa,bbb,ccc

　　

run.py

import redis

# Redis Host
REDIS_HOST = 'localhost'
# Redis PORT
REDIS_PORT = 6379
# 第几个redis库
REDIS_DB = 1

POOL = redis.ConnectionPool(host=REDIS_HOST, port=REDIS_PORT, db=REDIS_DB)
my_server = redis.Redis(connection_pool=POOL)


def read_in_data(file_name):
    data = []
    with open(file_name, 'r') as f:
        for line in f:
            line = line.strip()
            data.append(line.split(','))
    return data


def write_data_to_redis(data):
    my_server.set('counter', 0)
    for items in data:
        my_server.incr('counter')
        for item in items:
            my_server.rpush(items[0], item)


def get_data_from_redis():
    keys = my_server.keys()
    for key in keys:
        data_type = my_server.type(key)
        val = None
        if data_type.decode() == 'list':
            val = my_server.lrange(key, 0, -1)
        elif data_type == b'string':
            val = my_server.get(key)
        print("%s:%s" % (key, val))


if __name__ == '__main__':
    fileName = r'1.txt'
    data = read_in_data(fileName)
    write_data_to_redis(data)
    print('all data items number is %s' % my_server.get('counter'))
    print(my_server.keys())
    print(get_data_from_redis())

　　输出结果

all data items number is b'3'
[b'aaa', b'1', b'a', b'counter']
b'aaa':[b'aaa', b'bbb', b'ccc']
b'1':[b'1', b'2', b'3', b'4', b'55']
b'a':[b'a', b'b', b'c', b'd', b'mmm']
b'counter':b'3'
None