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aiomysql
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
Mailing List
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.
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())Connection Pool
Connection pooling ported from aiopg :
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.:
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
Changes
0.0.16 (2018-06-03)
Added ability to execute precompiled sqlalchemy queries #294 (Thanks @vlanse)
0.0.15 (2018-05-20)
Fixed handling of user-defined types for sqlalchemy #290
Fix KeyError when server reports unknown collation #289
0.0.14 (2018-04-22)
Fixed SSL connection finalization #282
0.0.13 (2018-04-19)
Added SSL support #280 (Thanks @terrycain)
Fixed __all__ in aiomysql/__init__ #270 (Thanks @matianjun1)
Added docker fixtures #275 (Thanks @terrycain)
0.0.12 (2018-01-18)
Fixed support for SQLAlchemy 1.2.0
Fixed argument for cursor.execute in sa engine #239 (Thanks @NotSoSuper)
0.0.11 (2017-12-06)
Fixed README formatting on pypi
0.0.10 (2017-12-06)
Updated regular expressions to be compatible with pymysql #167 (Thanks @AlexLisovoy)
Added connection recycling in the pool #216
0.0.9 (2016-09-14)
Fixed AttributeError in _request_authentication function #104 (Thanks @ttlttl)
Fixed legacy auth #105
uvloop added to test suite #106
Fixed bug with unicode in json field #107 (Thanks @methane)
0.0.8 (2016-08-24)
Default min pool size reduced to 1 #80 (Thanks @Drizzt1991)
Update to PyMySQL 0.7.5 #89
Fixed connection cancellation in process of executing a query #79 (Thanks @Drizzt1991)
0.0.7 (2016-01-27)
Fix for multiple results issue, ported from pymysql #52
Fixed useless warning with no_delay option #55
Added async/await support for Engine, SAConnection, Transaction #57
pool.release returns future so we can wait on it in __aexit__ #60
Update to PyMySQL 0.6.7
0.0.6 (2015-12-11)
Fixed bug with SA rollback (Thanks @khlyestovillarion!)
Fixed issue with default no_delay option (Thanks @khlyestovillarion!)
0.0.5 (2015-10-28)
no_delay option is deprecated and True by default
Add Cursor.mogrify() method
Support for “LOAD LOCAL INFILE” query.
Check connection inside pool, in case of timeout drop it, fixes #25
Add support of python 3.5 features to pool, connection and cursor
0.0.4 (2015-05-23)
Allow to call connection.wait_closed twice.
Fixed sqlalchemy 1.0.0 support.
Fix #11: Rename Connection.wait_closed() to .ensure_closed()
Raise ResourceWarning on non-closed Connection
Rename Connection.connect to _connect
0.0.3 (2015-03-10)
Added support for PyMySQL up to 0.6.6.
Ported improvements from PyMySQL.
Added basic documentation.
Fixed and added more examples.
0.0.2 (2015-02-17)
Added MANIFEST.in.
0.0.1 (2015-02-17)
Initial release.
Implemented plain connections: connect, Connection, Cursor.
Implemented database pools.
Ported sqlalchemy optional support.
5 maintainers
Metadata
5 maintainers
Release files for aiomysql 0.0.16
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