[PyCon KR 2018] Making asyncio on our own

Transcript

1. Making asyncio on our own! Joongi Kim (
   ) Lablup / KossLab
2. Outline §    §   asyncio  async/await   §   : sleep 
    § Summary & Homework PyCon KR 2018
3.   
   Live Coding PyCon KR 2018
4. async/await 
   Live Coding PyCon KR 2018
5. async/await
    § PEP-380:      
    • yield from 
   : generator   generator •  caller   ! "(=generator)   
     ! " yield#    $  PyCon KR 2018
6. async/await
    § PEP-492 : async await   
   • yield from2 generator :4  – yield @04 <9,  def4 4
    (func. vs generator) • yield from3  await  * 5 DI , >5:2... – async def (,  await /C ; : '%
   # $ – await GJ= )2 async J% !+
   : 6BE5& 7# L • async for, async with- 2 FI 7# 8 "A ?
   • LN async generator M3 1K yield @04  H.# PyCon KR 2018
7.  : sleep 
    Live Coding PyCon KR 2018
8. Hints § "async_sleep"          §
     expire sleep ! task  •  %  )   "
   · !*  ? • ' $  &(/#  ) ? § select   timeout  " PyCon KR 2018
9. Summary PyCon KR 2018
10. Summary § asyncio   
     ! •
    ' + /2! 7 Future , yield4,  Future ,   8 4  1 3: –  await ;.,%#  7 Can , yield6 •  1  /2"  *90 ! - caller, ) event loop# 5 – # run() 6 8 • $ 8 event loop future" "book-keeping"8 6 – # WAIT_* &( 8 PyCon KR 2018
11. Summary • asyncio.Future – 
     Can    • asyncio.Task – 
     Task   • asyncio.BaseEventLoop – 
        § curio, trio
       I/O      ! PyCon KR 2018
12. Homework § select *'$  selectors *'$ , . • kqueue / epoll !& % "  • select   kqueue / epoll / IOCP % 
    &% § Future "(+!  Can/Task . §  $  Can/Task - cancel!
    , . • Cancellation $' :   vs. generator.close() § trio/curio )#  %!# & § Javascript async/await,  $ & •  generator vs. #  Promise PyCon KR 2018
13. Thanks! PyCon KR 2018
14. Reference § PEP 342 – Coroutines via Enhanced Generators § PEP 380 – Syntax for Delegating to a Subgenerator § PEP 492 – Coroutines with async and await syntax § PEP-3156 – Asynchronous IO Support Rebooted: the "asyncio" Module § Jonas Obrist's "Artisanal Asyncio Adventures" Talks § CPython's asyncio module source code on GitHub § curio (https://github.com/dabeaz/curio) § trio (https://github.com/python-trio/trio) PyCon KR 2018