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From: Marko Rauhamaa <marko@pacujo.net>
Newsgroups: comp.lang.python
Subject: Re: Question about asyncio doc example
Date: Thu, 24 Jul 2014 08:54:07 +0300
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Saimadhav Heblikar <saimadhavheblikar@gmail.com>:

> For situations where I dont really know how long a function is going
> to take(say waiting for user input or a network operation), I am
> better off using callbacks than "yield from asyncio.sleep()". Is my
> understanding correct?

If you choose the coroutine style of programming, you wouldn't normally
use callbacks. Instead, you would "yield from" any blocking event. There
are coroutine equivalents for locking, network I/O, multiplexing etc.

The callback style encodes the state in a variable. The coroutine style
(which closely resembles multithreading), encodes the state in the code
itself. Both styles can easily become really messy (because reality is
surprisingly messy).


Marko