异步编程 Python asyncio 小白学习 – 5.2 异步MySQL

安装aiomysql模块

pip3 install aiomysql

示例1:

import asyncio
import aiomysql


async def execute():
    # 网络IO操作:连接MySQL
    conn = await aiomysql.connect(host='127.0.0.1', port=3306, user='root', password='123', db='mysql', )

    # 网络IO操作:创建CURSOR
    cur = await conn.cursor()

    # 网络IO操作:执行SQL
    await cur.execute("SELECT Host,User FROM user")

    # 网络IO操作:获取SQL结果
    result = await cur.fetchall()
    print(result)

    # 网络IO操作:关闭链接
    await cur.close()
    conn.close()


asyncio.run(execute())

示例2:

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import asyncio
import aiomysql


async def execute(host, password):
    print("开始", host)
    # 网络IO操作:先去连接 47.93.40.197,遇到IO则自动切换任务,去连接47.93.40.198:6379
    conn = await aiomysql.connect(host=host, port=3306, user='root', password=password, db='mysql')

    # 网络IO操作:遇到IO会自动切换任务
    cur = await conn.cursor()

    # 网络IO操作:遇到IO会自动切换任务
    await cur.execute("SELECT Host,User FROM user")

    # 网络IO操作:遇到IO会自动切换任务
    result = await cur.fetchall()
    print(result)

    # 网络IO操作:遇到IO会自动切换任务
    await cur.close()
    conn.close()
    print("结束", host)


task_list = [
    execute('47.93.41.197', "root!2345"),
    execute('47.93.40.197', "root!2345")
]

asyncio.run(asyncio.wait(task_list))