本文介绍了从协程VS产量从产量任务的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

吉多·范罗苏姆,在他2014年的郁金香/ ASYNCIO :

Guido van Rossum, in his speech in 2014 on Tulip/Asyncio shows the slide:

任务VS协同程序


      
  • 比较:

  • Compare:


      
  • 解析度=从some_coroutine产量(...)

  •   
  • 解析度=从任务收益率(some_coroutine(...))

  •   

任务就能取得进展,而不必等待它

Task can make progress without waiting for it


      
  • 日志,你等待别的东西
      

        
    • 即。从产量

    •   

    和我完全缺少点。

    从我的角度来看这两种结构是相同的:结果
    我裸露的协同程序的情况下 - 它被预定的,所以任务反正创建,因为调度运行使用任务,然后协同程序调用者协同程序被暂停,直到被调用者完成的,然后成为自由继续执行。

    From my point of view both constructs are identical:
    I case of bare coroutine - it gets scheduled, so the task is created anyways, because scheduler operates with Tasks, then coroutine caller coroutine is suspended until callee is done and then becomes free to continue execution.

    在任务的情况下 - 都一样 - 新的任务schduled和来电协程等待其完成

    In case of Task - all the same - new task is schduled and caller coroutine waits for its completion.

    那是什么美元,这两种情况下产生怎样的影响它的开发人员应该在实践中考虑?执行C $ c。在这样的差异

    What is the difference in the way that code executed in both cases and what impact it has that developer should consider in practice?

    P.S。结果
    链接权威人士(GVR,政治公众人物,文档,开发者的核心笔记)将是非常美联社preciated。

    p.s.
    Links to authoritative sources (GvR, PEPs, docs, core devs notes) will be very appreciated.

    推荐答案

    有关调用从协程协同例程收益率()感觉像一个函数调用(即,它会再次获得控制时,协程()完成)。

    For the calling co-routine yield from coroutine() feels like a function call (i.e. it will again gain control when coroutine() finishes).

    从任务(协程())收益率,另一方面感觉更像是创建一个新线程。 任务()返回几乎立即机会是有,以前来电者获得控制权的协程()结束。

    yield from Task(coroutine()) on the other hand feels more like creating a new thread. Task() returns almost instantly and chances are there that the caller gains control before coroutine() finishes.

    F的的差异() TH = threading.Thread(目标= F,ARGS =()); th.start(); th.join()是显而易见的,对吧?

    The difference between f() and th = threading.Thread(target=f, args=()); th.start(); th.join() is obvious, right?

    这篇关于从协程VS产量从产量任务的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-28 07:05