在Python异步方法调用？ [英] Asynchronous method call in Python?

问题描述

我在想，如果有一个为异步方法任何一间图书馆 Python的调用。这将是巨大的，如果你可以不喜欢

I was wondering if there's any library for asynchronous method calls in Python. It would be great if you could do something like

@async
def longComputation():
    <code>


token = longComputation()
token.registerCallback(callback_function)
# alternative, polling
while not token.finished():
    doSomethingElse()
    if token.finished():
        result = token.result()

或者异步调用非异步例行

Or to call a non-async routine asynchronously

def longComputation()
    <code>

token = asynccall(longComputation())

这将是巨大的，有一个更精致的策略，如在语言核心的原生。是这样的考虑？

It would be great to have a more refined strategy as native in the language core. Was this considered?

推荐答案

您可以使用多模块在Python 2.6增加。您可以使用流程池，然后用得到的结果异步：

You can use the multiprocessing module added in Python 2.6. You can use pools of processes and then get results asynchronously with:

apply_async(func[, args[, kwds[, callback]]])

例如：

from multiprocessing import Pool

def f(x):
    return x*x

if __name__ == '__main__':
    pool = Pool(processes=1)              # Start a worker processes.
    result = pool.apply_async(f, [10], callback) # Evaluate "f(10)" asynchronously calling callback when finished.

这是唯一的选择。该模块提供了大量的设施，以达到你想要的东西。此外，它会很容易使从这一个装饰。

This is only one alternative. This module provides lots of facilities to achieve what you want. Also it will be really easy to make a decorator from this.

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