欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

Python异步操作MySQL示例【使用aiomysql】

程序员文章站 2023-01-09 22:12:38
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...

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。