asyncio community, one year later
- 1. EuroPython 2015, Bilbao Victor Stinner vstinner@redhat.com Distributed under CC BY-SA license: http://creativecommons.org/licenses/by-sa/3.0/ Asyncio community one year later
- 2. Python core developer since 5 years Senior Software Engineer at Red Hat Port OpenStack to Python 3 Working remotely from South of France Victor Stinner
- 3. Python 3.4.0: March 2014 Bare: almost no library Asyncio launch
- 4. python-tulip mailing list (Google Group) #asyncio IRC channel on Freenode https://github.com/python/asyncio Python bug tracker (bugs.python.org) More and more conferences! Community
- 5. Most famous and successful library HTTP client and server HTTPS Client and server Websocket https://aiohttp.rtfd.org/ aiohttp
- 6. @asyncio.coroutine def fetch_page(url): req = yield from aiohttp.request('GET', url) assert req.status == 200 return (yield from req.read()) aiohttp client example
- 7. MySQL: aiomysql PostgreSQL: aiopg (based on psycopg2) SQL drivers
- 8. dsn = 'dbname=aiopg host=127.0.0.1 user=…' @asyncio.coroutine def go(): pool = yield from aiopg.create_pool(dsn) with (yield from pool.cursor()) as cur: yield from cur.execute("SELECT 1") row = yield from cur.fetchone() assert row == (1,) aiopg example
- 10. memcached: aiomemcache redis: aioredis redis: asyncio-redis Key-value stores
- 11. @asyncio.coroutine def wait_each_command(): foo = yield from redis.get('foo') bar = yield from redis.incr('bar') return foo, bar aioredis example
- 12. @asyncio.coroutine def pipelined(): get = redis.get('foo') incr = redis.incr('bar') foo, bar = yield from asyncio.gather(get, incr) return foo, bar aioredis pipeline example
- 14. DNS: aiodns (async resolver) IRC: bottom IRC: irc3 SSH: AsyncSSH XMPP (Jabber): slixmpp Clients
- 15. AMI: panoramisk (AMI and FastAGI) AMQP: aioamqp ElasticSearch: aioes Etcd: aioetcd Google Hangouts: hangups More clients
- 18. FastAGI (Asterisk): panoramisk IRC: irc3.irc3d HTTP: aiohttp SSH: AsyncSSH Servers
- 19. @asyncio.coroutine def hello(request): return web.Response(body=b"Hello, world") app = web.Application() app.router.add_route('GET', '/', hello) aiohttp server
- 20. @asyncio.coroutine def stats(request): body = yield from get_stats() return web.Response(body=body) app.router.add_route('GET', '/stats', stats) aiohttp server
- 21. asynctest: for unittest pytest-asyncio: for pytest aiotest (test asyncio implementation) Unit tests
- 22. Trollius is the Python 2 port of asyncio Work on Python 2.6 – 3.5 Use “yield From(...)” instead of “yield from ...” Only a few asyncio libraries are compatible with trollius Only use it if you cannot port your application to Python 3 Trollius
- 23. Ludovic Gasc ran benchmark on Flask, Django and API Hour (asyncio) API Hour is as fast or much faster Best case: API-Hour handles 5x more requests per second JSON serialization: 400k req/s API- Hour vs 70-79k for Django-Flask Details: http://blog.gmludo.eu/ Benchmarks
- 24. Need tutorials and more documentation Port more stdlib modules to asyncio: ftplib, poplib, imaplib, nntplib, smtplib, telnetlib, xmlrpclib, etc. Interoperability with Twisted How can you help?
- 25. Questions? http://www.asyncio.org/ github.com/python/asyncio/wiki/ThirdParty Distributed under CC BY-SA license: http://creativecommons.org/licenses/by-sa/3.0/ Contact : vstinner@gmail.com