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這篇文章給大家介紹使用Python怎么實現異步操作MySQL,內容非常詳細,感興趣的小伙伴們可以參考借鑒,希望對大家能有所幫助。
安裝aiomysql
依賴
Python3.4+
asyncio
PyMySQL
安裝
pip install aiomysql
應用
基本的異步連接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())
異步的連接池 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))
對象關系映射SQLAlchemy - Object Relationship Mapping
可以隨意定義表結構,輕松調用查詢、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', 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))
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