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How Do Python Coroutines Work?
--client
big_apple_py
--show
pygotham_2015
--room room702 10012 --force
Next: 11 PyLLVM: A compiler from Python to LLVM-IR
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Marks
Author(s):
A. Jesse Jiryu Davis
Location
Room 702
Date
aug Sun 16
Days Raw Files
Start
16:00
First Raw Start
15:54
Duration
00:25:00
Offset
0:05:48
End
16:25
Last Raw End
16:38
Chapters
00:00
Total cuts_time
32 min.
https://pygotham.org/2015/talks/162/how-do-python-coroutines-work
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Python 3's new “asyncio” module is an efficient async framework similar to Node. But unlike Node, it emphasizes a modern idiom called "coroutines", rather than callbacks. Coroutines promise the best of two worlds: the efficiency of callbacks, but with a natural and robust coding style similar to synchronous programming. In barely 30 minutes I live-code a Python 3 async framework. First, I show how an async framework uses non-blocking sockets, callbacks, and an event loop. This version of the framework is very efficient, but callbacks make a mess of the code. Therefore, I implement coroutines using Python generators and two classes called Future and Task, and update my little framework to use coroutines instead of callbacks. The live-coding demo isn't just a magic trick: watch to see how simply a coroutine-based async framework can be implemented, and gain a deep understanding of this miraculous new programming idiom in the Python 3 standard library.
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