本文例項講述了Python非同步操作MySQL。分享給大家供大家參考，具體如下：

安裝aiomysql

依賴

• Python3.4+
• asyncio
• PyMySQL

安裝

pip install aiomysql

應用

基本的非同步連線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())

非同步的連線池 pool

import asyncio
import aiomysql
async def test_example(loop):
  pool = await aiomysql.create_pool(host='127.0.0.1',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))

物件關係對映SQLAlchemy - Object Relationship Mapping

可以隨意定義表結構，輕鬆呼叫查詢、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',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))

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希望本文所述對大家Python程式設計有所幫助。