asyncio community, one year later
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The asyncio project was officially launched with the release of Python 3.4 in March 2014. The project was public before that under the name “tulip”. asyncio is just a core network library, it requires third party library to be usable for common protocols. One year later, asyncio has a strong community writing libraries on top of it. The most advanced library is aiohttp which includes a complete HTTP client but also a HTTP server. There are also libraries to access asynchronously the file system, resolve names with DNS, have variables local to tasks, read-write locks, etc. There are clients for AMQP, Asterisk, ElasticSearch, IRC, XMPP (Jabber), etc. (and even an IRC server!). There are asynchronous drivers for all common databases, and even for some ORMs. As expected, there are tons of new web frameworks based on asyncio. It’s also possible to plug asyncio into Gtk, Qt, gevent, eventlet, gunicorn, tornado, etc. I will also discuss use cases of asyncio in production and benchmarks. Spoiler: asyncio is not slow. The asyncio library also evolved to become more usable: it has a better documentation, is easier to debug and has a few new functions. There is also a port to Python 2: trollius.
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Psgi Plack Sfpm
PSGI and Plack provide a common interface (PSGI) and shared infrastructure (Plack) for building web applications and frameworks in Perl. PSGI defines a standard way for applications to communicate with web servers through a request/response interface. Plack provides many server implementations like FastCGI and standalone that can run PSGI applications. It also includes middleware, testing tools, and utilities to help developers. This new approach allows frameworks and applications to focus on their logic while reusing common plumbing through PSGI and Plack.
Psgi Plack Sfpm
PSGI and Plack provide a common interface (PSGI) and shared infrastructure (Plack) for building web applications and frameworks in Perl. PSGI defines a standard way for applications to communicate with web servers through a request/response interface. Plack provides many server implementations like FastCGI and standalone that can run PSGI applications. It also includes middleware, testing tools, and utilities to help developers. This new approach allows frameworks and applications to focus on their logic while reusing common plumbing through PSGI and Plack.
Nodejs and WebSockets
Node.js is an asynchronous event-driven JavaScript runtime that allows JavaScript to be used on the server-side. It uses a non-blocking I/O model that makes it suitable for real-time web applications. WebSockets provide a standardized way for the browser and server to establish two-way communication. However, not all browsers support WebSockets yet. Socket.io addresses this by providing a WebSocket-like experience across all browsers through fallbacks like long-polling. It allows real-time applications to be developed more easily.
Aio...whatever
Asyncio, ce nouveau truc avec des coroutines, des tasks et une event loop? Ça a l'air cool. Mais bon il y a plein de nouvelles notions à comprendre (coroutines?). Et finalement, qu'est-ce que ça permet d'accomplir de plus que les outils qu'on connaît et maîtrise?
Cette présentation va vous permettre de comprendre le génie intrinsèque de asyncio... ou pas. Vous allez plutôt en sortir avec une meilleure idée de ce que ça peut vous permettre de réaliser, et vous aurez vu un cas pratique qui l'utilise.
From ZERO to REST in an hour
So, you heard "the Web is Programmable, Internet of Things, Digitalization", but have NO to little programming skills. Nevertheless, this is 2016, and you want to get enough about Web Programming to be part of the some fun and exciting Web challenge, participate in an Hackathon may be …
Well, I am happy we meet. I suggest you take the tour “from ZERO to REST in a hour”: we’ll teach you to forge your own HTTP requests against the Github API. After this tour, you’ll know enough to interact with any RESTful Web APIs. Worth mentionning this presentation is entirely scripted: so give attention to each slide comments.
Did you enjoy the tour ? look forward to learn more ?
Post your comments below about enhancements, and for any subjects you’d like to see covered.
2. Join the Cisco developers community : https://developer.cisco.com/
3. Take a free online Coding Lab (REST, Python, Parsing JSON, RAML, Git…)
https://learninglabs.cisco.com/labs/tags/Coding
4. Meet DevNet teams at a physical event: conferences, hackathons
https://developer.cisco.com/site/devnet/events-contests/events/
Plack - LPW 2009
- PSGI (Perl Web Server Gateway Interface) and Plack provide a common interface and utilities for building web applications and servers in Perl.
- PSGI defines a standard interface that web frameworks can implement to work with different server implementations. Plack provides server implementations like standalone, FastCGI and Apache modules.
- This allows frameworks to focus on the application code instead of server specifics, and servers to handle multiple frameworks. Common middleware and testing utilities are also included.
- Examples of frameworks that have adopted PSGI include Catalyst, Maypole and Mojolicious. Popular servers built on Plack include Starman and Dancer.
Similar to asyncio community, one year later (20)
Plack perl superglue for web frameworks and servers
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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