列举几个redis中常用的IO多路复用代码

以下是几个常用的Redis IO多路复用代码：

1. 使用select()函数实现IO多路复用

import select

read_list = [socket1, socket2, socket3]
write_list = [socket1, socket2]

while True:
    read_ready, write_ready, _ = select.select(read_list, write_list, [])
    for s in read_ready:
        data = s.recv(1024)
        # 处理接收到的数据
    for s in write_ready:
        # 发送数据

2. 使用epoll()函数实现IO多路复用

import select

epoll = select.epoll()
epoll.register(socket1, select.EPOLLIN)
epoll.register(socket2, select.EPOLLIN | select.EPOLLOUT)
epoll.register(socket3, select.EPOLLOUT)

while True:
    events = epoll.poll(timeout=1)
    for fd, event in events:
        if event & select.EPOLLIN:
            data = fd.recv(1024)
            # 处理接收到的数据
        if event & select.EPOLLOUT:
            # 发送数据

3. 使用asyncio模块实现IO多路复用

import asyncio

async def handle_socket(socket):
    while True:
        data = await loop.sock_recv(socket, 1024)
        # 处理接收到的数据
        await loop.sock_sendall(socket, b'response')

async def main():
    socket1 = socket(AF_INET, SOCK_STREAM)
    socket2 = socket(AF_INET, SOCK_STREAM)
    socket1.connect(('localhost', 8000))
    socket2.connect(('localhost', 9000))
    await asyncio.gather(
        handle_socket(socket1),
        handle_socket(socket2),
    )

loop = asyncio.get_event_loop()
loop.run_until_complete(main())