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![Python 3.4 – asyncio loop
▪ loop.close()
..
import asyncio
import asyncio_redis
loop = asyncio.get_event_loop()
conn = loop.run_until_complete(
asyncio_redis.Connection.create('localhost', 6379))
conn.close()
loop.close()
Task was destroyed but it is pending!
task: <Task pending coro=<_reader_coroutine() running at /...
/lib/python3.4/site-packages/asyncio_redis/protocol.py:919>
wait_for=<Future pending cb=[Task._wakeup()]>>](https://image.slidesharecdn.com/pyconkr2015-lablup-final-150829145030-lva1-app6892/85/PyCon-KR-2015-63-320.jpg)
![Python 3.4 – asyncio loop
#! /usr/bin/env python3
import asyncio
loop = asyncio.get_event_loop()
@asyncio.coroutine
def my_timer():
i = 0
while True:
yield from asyncio.sleep(1)
print(i)
i += 1
try:
asyncio.async(my_timer(), loop=loop)
loop.run_forever()
except KeyboardInterrupt:
pass
finally:
loop.close()
^CTask was destroyed but it is pending!
task: <Task pending coro=<my_timer() done, defined at test.py:4>
wait_for=<Future pending cb=[Task._wakeup()]>>](https://image.slidesharecdn.com/pyconkr2015-lablup-final-150829145030-lva1-app6892/85/PyCon-KR-2015-65-320.jpg)
Uploaded byJeongkyu Shin
연구자 및 교육자를 위한 계산 및 분석 플랫폼 설계 - PyCon KR 2015
This document discusses various Python and web development topics. It covers Python programming best practices and libraries like asyncio and NumPy. It also discusses front-end frameworks like Polymer and Electron. Additional sections provide overviews of containerization with Docker, message queues like ZeroMQ, log aggregation with Logstash, and cloud hosting options.
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- 4. ▪ ▪ ▪ / ▪ ▪ / ▪ TNF/Needlworks ▪ … ▪ ▪ ▪ ▪ NBA ▪ 80 Gbps ▪ ▪ … http://www.lablup.com .
- 5. ▪ 21 ,20 , 19 ▪ ▪ ,
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- 9. ▪ ▪ ▪ / // ▪ ▪ /
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- 15. Python T_T ▪ ▪ ▪ PyPy/ Pyston ▪ : ▪ C ▪ Cython ▪
- 16. Python / ▪ ▪ CS101 ▪“ ” ▪ ▪ indent … ▪ ▪ MATLAB numpy
- 17. : ▪ ▪ MATLAB :matplotlib, ipython notebook ▪ Ultra-complex figures ▪ ▪ ▪ ▪ /
- 18. : ▪ ▪ NBA ▪ ▪ configurationPython ▪ I/O stdout asyncio
- 19. It's time togo Python 3 ▪ Python 3 ▪ Django, numpy/scipy, … ▪ Python 3.3 ▪ PEP-393: str unicode codepoint ▪ narrow build UTF-16, wide build UTF-32 ▪ UTF-8/16/32 ▪ ASCII/Latin-1 ▪ / ·
- 20. It's time togo Python 3 ▪ Python 3.4 ▪ PEP-3156: asyncio coroutine ▪ I/O ▪ GIL (global interpreter lock) ▪ ▪ pip virtualenv ▪
- 21. ▪ RabbitMQ, Kafka,Celery, ... ▪ ▪ (broker) , ▪ redis …
- 22. – ZeroMQ ▪ ▪ Request-Reply ▪1 ( : HTTP-like server/client) ▪ Push-Pull ▪ N-to-1 ( : logging system, task partitioning) ▪ Publish-Subscribe ▪ 1-to-N / N-to-M ( : broadcast)
- 23. – ZeroMQ ▪ : ▪zero broker, zero latency, zero administration, ... ▪ : connection ▪ TCP / UDP / UNIX domain / local "in-process" ▪ zeromq transport header (ZMTP) ▪ payload (64+ ) ▪ : persistent queue ▪ TCP reliability
- 24. – LogStash ▪ LogStash ▪input / filter / output ▪ ZeroMQ, S3 ▪ ( !) Django User Kernel Logstash Server Database ZeroMQ (push-pull) + JSON AWS S3 msgpack
- 25. On-premise vs. Hostingvs. Cloud ▪ ▪ " " ... ▪ , , ▪ AWS ▪ ▪ ▪ … ▪ 2012 R2 / / .
- 26. Docker containers ▪ dockercontainer ▪ ▪ VM deploy/destroy ▪ AWS EC2 Instance: ( ) ▪ pooling ▪ Amazon ECS? ▪ container (run task) latency ▪ …
- 27. Docker containers ▪ ▪ :instance ▪ Microsoft docker ▪ Azure Windows
- 28. Polymer library ▪ HTML5 ▪HTML imports / Custom elements / Shadow DOM ▪ Web components ▪ “Polyfill” ▪ ▪ DOMelements
- 29. Polymer library ▪ ... ▪! ▪ Bootstrap + theme? ▪ ▪ HTML5 !
- 32. HTML imports! Reusable web components! ShadowDOM! Polyfill!
- 33.
- 34. Electron: Cross-platform Polymer ▪: cross-platform webapp container ▪ Electron ▪ Github Node.js ▪ Node Chromium wrapping ▪ / / ▪ ATOM ▪ ? ▪ Apache Cordova
- 35. ▪ ▪ ▪ ▪ Django UnitTest+ Selenium ▪ Selenium webdriver: ▪
- 36.
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- 39.
- 40. ▪ + . ▪ : ▪– ▪ , , scaling, ... ➞ ++ ▪ : ▪ – ▪
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- 51. ▪ React /Flux / AngularJS / Polymer / ... ▪ +UI ▪ Polymer 0.9 API .... ▪ (?) Bootstrap … ▪ I/O 2015 Polymer 1.0 ...
- 52. Polymer: it istoo google to be true ▪ ▪ 0.5 - 0.8rc2 - 0.9 - … ▪ ▪ ( ) ▪ Google I/O - 1.0 :
- 53. Polymer: vulcanize ▪ Vulcanize ▪: ▪ IE – + ▪ CSS – + ▪ Crisper javascript map shadow DOM root - +
- 54. Polymer: vulcanize ▪ Vulcanize ▪: ▪ IE – ▪ CSS – ▪ Crisper javascript map shadow DOM root -
- 55. Polymer: polyfill ▪ ▪ ▪ (html import shadowDOM) polyfill ▪ ▪
- 56. Polymer + Django ▪ ▪{{ … }} ▪ Polymer – ▪ Django – ▪ ▪ ▪ …
- 57. Polymer + Django+ Security ▪ CORS (cross-origin resource scripting) ▪ Django – CORS header ( ) ▪ Polymer – vulcanize Javascript CORS ▪ Crisper CORS Javascript ▪ - ▪ XSS ▪ Django - CSRF token ▪ Polymer – header iron-ajax ▪
- 58. Polymer ▪ Production ready?! ▪ ▪“Do not swim in sandocean. Swim in the ocean.” ▪ HTML5 ▪ ▪ X-tag, react, polymer… ▪ ?
- 59. Polymer ▪ Production ready?! ▪ ▪“Do not swim in sandocean. Swim in the ocean.” ▪ HTML5 ▪ ▪ X-tag, react, polymer… ▪ ?
- 60. Electron + web ▪... ! ▪ ▪ (Noto ) ▪ ▪ CSS: . ▪ ?
- 61. : Django +RDS ▪ UTF-8 Python ? ▪ (cf., str / bytes / io / codecs) ▪ MySQL SQLite ▪ MySQL ▪ ForeignKey Django ▪ MySQL + Django + Korean = EPIC FAIL ▪ ( ) Postgres ... ▪ postgres ( / ) .
- 62. Python 3.4 –asyncio / coroutine ▪ . ▪ yield from ... ▪ AST static analysis coroutine yield from ▪ , 100% static analysis ▪ duck typing + dynamic method generation + method proxy pattern ... ▪ Python 3.5 await/async !
- 63. Python 3.4 –asyncio loop ▪ loop.close() .. import asyncio import asyncio_redis loop = asyncio.get_event_loop() conn = loop.run_until_complete( asyncio_redis.Connection.create('localhost', 6379)) conn.close() loop.close() Task was destroyed but it is pending! task: <Task pending coro=<_reader_coroutine() running at /... /lib/python3.4/site-packages/asyncio_redis/protocol.py:919> wait_for=<Future pending cb=[Task._wakeup()]>>
- 64. Python 3.4 –asyncio loop ▪ asyncio graceful shutdown , 1. loop._run_once() 2. loop.run_until_complete(asyncio.sleep(0)) 3. loop.run_until_complete(server.wait_closed()) ▪ , wait_closed() coroutine . ▪ event loop .
- 65. Python 3.4 –asyncio loop #! /usr/bin/env python3 import asyncio loop = asyncio.get_event_loop() @asyncio.coroutine def my_timer(): i = 0 while True: yield from asyncio.sleep(1) print(i) i += 1 try: asyncio.async(my_timer(), loop=loop) loop.run_forever() except KeyboardInterrupt: pass finally: loop.close() ^CTask was destroyed but it is pending! task: <Task pending coro=<my_timer() done, defined at test.py:4> wait_for=<Future pending cb=[Task._wakeup()]>>
- 66. Python 3.4 –asyncio loop #! /usr/bin/env python3 import asyncio loop = asyncio.get_event_loop() @asyncio.coroutine def my_timer(): i = 0 while True: yield from asyncio.sleep(1) print(i) i += 1 try: asyncio.async(my_timer(), loop=loop) loop.run_forever() except KeyboardInterrupt: for t in asyncio.Task.all_tasks(): t.cancel() try: loop._run_once() except asyncio.CancelledError: pass finally: loop.close()
- 67. asyncio_redis ▪ Redis asyncio ▪Heisenbug ! 🚨 ▪ SCAN key ... ▪ while if ➞ ▪ https://github.com/jonathanslenders/asyncio- redis/issues/65 ▪ Connection pool API ▪ API call connection stateful API ( : SELECT) ▪ (aioredis)
- 68. : – ZeroMQ ▪Asynchronous ? block ?? ▪ socket connect . ( ...) ▪ send/recv timeout ▪ aiozmq , blocking call asyncio.wait_for timeout . ▪ pyzmq , socket.poll(msec) timeout .
- 69. : – LogStash ▪zmq input plugin s3 output plugin zmq recv_string ▪ 1: s3 output plugin “write” , PutObject DeleteObject . ▪ 2: config , output plugin log level · . ▪ 3: output plugin input plugin receive timeout .
- 70. : Docker ▪ ▪ dockerregistry "latest" latest ▪ 2.0 2.0.1 tag ▪ ▪ ▪ docker 1.8 , CoreOS (rkt) ▪ /API
- 71. : ▪ Jupyter /ipython ▪ scalable ▪ Jupyter ▪ Unix ▪ ▪ : ▪ ▪ – Sorna ▪ .
- 72.
- 73. ▪ Container ResourceConsolidation ▪ Kubernetes ▪ paxos raft agreement key-value store . ▪ Ingen REPL (read-evaluate-print loop) ▪ stdout/stderr streaming ▪ interactive plot ▪ image, sound multimedia
- 74. ▪ ▪ ▪ User profiler+ backtracer + ML with back propagation ▪ ▪ d3.js fluid nonlinear navigation UI ▪ ▪ ▪ ▪ ▪
- 75. ▪ . ▪ ... ++ … ▪ . ▪ ?
- 77.