aiomysql

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aiomysql is a "driver" for accessing a MySQL database from the asyncio_ (PEP-3156/tulip) framework. It depends on and reuses most parts of PyMySQL_ . aiomysql tries to be like awesome aiopg_ library and preserve same api, look and feel.

Internally aiomysql is copy of PyMySQL, underlying io calls switched to async, basically yield from and asyncio.coroutine added in proper places)). sqlalchemy support ported from aiopg_.

Documentation

https://aiomysql.readthedocs.io/

Mailing List

https://groups.google.com/forum/#!forum/aio-libs

Basic Example

aiomysql based on PyMySQL_ , and provides same api, you just need to use await conn.f() or yield from conn.f() instead of calling conn.f() for every method.

Properties are unchanged, so conn.prop is correct as well as conn.prop = val.

.. code:: python

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))

Example of SQLAlchemy optional integration

Sqlalchemy support has been ported from aiopg_ so api should be very familiar for aiopg_ user.:

.. code:: python

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))

Requirements

• Python_ 3.5.3+
• PyMySQL_

.. _Python: https://www.python.org .. _asyncio: http://docs.python.org/3.5/library/asyncio.html .. _aiopg: https://github.com/aio-libs/aiopg .. _PyMySQL: https://github.com/PyMySQL/PyMySQL .. _Tornado-MySQL: https://github.com/PyMySQL/Tornado-MySQL