Python异步操作MySQL示例【使用aiomysql】
2019/7/14 23:11:21
本文主要是介绍Python异步操作MySQL示例【使用aiomysql】,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
本文实例讲述了Python异步操作MySQL。分享给大家供大家参考,具体如下:
安装aiomysql
依赖
- Python3.4+
- asyncio
- PyMySQL
安装
pip install aiomysql
应用
基本的异步连接connection
import asyncio from aiomysql import create_pool loop = asyncio.get_event_loop() async def go(): async with create_pool(host='127.0.0.1', port=3306, user='root', password='', db='mysql', loop=loop) as pool: async with pool.get() as conn: async with conn.cursor() as cur: await cur.execute("SELECT 42;") value = await cur.fetchone() print(value) loop.run_until_complete(go())
异步的连接池 pool
import asyncio import aiomysql async def test_example(loop): pool = await aiomysql.create_pool(host='127.0.0.1', port=3306, user='root', password='', db='mysql', loop=loop) async with pool.acquire() as conn: async with conn.cursor() as cur: await cur.execute("SELECT 42;") print(cur.description) (r,) = await cur.fetchone() assert r == 42 pool.close() await pool.wait_closed() loop = asyncio.get_event_loop() loop.run_until_complete(test_example(loop))
对象关系映射SQLAlchemy - Object Relationship Mapping
可以随意定义表结构,轻松调用查询、插入等操作方法。
import asyncio import sqlalchemy as sa from aiomysql.sa import create_engine metadata = sa.MetaData() tbl = sa.Table('tbl', metadata, sa.Column('id', sa.Integer, primary_key=True), sa.Column('val', sa.String(255))) async def go(loop): engine = await create_engine(user='root', db='test_pymysql', host='127.0.0.1', password='', loop=loop) async with engine.acquire() as conn: await conn.execute(tbl.insert().values(val='abc')) await conn.execute(tbl.insert().values(val='xyz')) async for row in conn.execute(tbl.select()): print(row.id, row.val) engine.close() await engine.wait_closed() loop = asyncio.get_event_loop() loop.run_until_complete(go(loop))
更多关于Python相关内容感兴趣的读者可查看本站专题:《Python常见数据库操作技巧汇总》、《Python数学运算技巧总结》、《Python数据结构与算法教程》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》、《Python入门与进阶经典教程》及《Python文件与目录操作技巧汇总》
希望本文所述对大家Python程序设计有所帮助。
这篇关于Python异步操作MySQL示例【使用aiomysql】的文章就介绍到这儿,希望我们推荐的文章对大家有所帮助,也希望大家多多支持为之网!
- 2024-11-25Python编程基础:变量与类型
- 2024-11-25Python编程基础与实践
- 2024-11-24Python编程基础详解
- 2024-11-21Python编程基础教程
- 2024-11-20Python编程基础与实践
- 2024-11-20Python编程基础与高级应用
- 2024-11-19Python 基础编程教程
- 2024-11-19Python基础入门教程
- 2024-11-17在FastAPI项目中添加一个生产级别的数据库——本地环境搭建指南
- 2024-11-16`PyMuPDF4LLM`:提取PDF数据的神器