多处理在 Python 中工作，但不在 iPython 中

问题描述

我在 iPython 中运行以下代码:

I am running the following code in iPython:

import multiprocessing

def my_function(x):
    """The function you want to compute in parallel."""
    x += 1
    return x


if __name__ == '__main__':
    pool = multiprocessing.Pool()
    results = pool.map(my_function, [1,2,3,4,5,6])
    print(results)

在 Windows 上的 ipython QT 控制台中.但是，代码不起作用——QT 控制台只是冻结了.这个问题是 iPython 特有的(上面的代码应该适用于常规的 Python 2.7).

in ipython QT console on Windows. However, the code does not work -- the QT console just freezes up. The issue is specific to iPython (the code above should work for the regular Python 2.7).

有什么解决办法吗?

推荐答案

来自 文档:

注意

此包中的功能要求 __main__ 模块是孩子们可以导入.这在编程指南中有介绍但是值得在这里指出.这意味着一些例子，比如 multiprocessing.Pool 的例子在交互式解释器

Functionality within this package requires that the __main__ module be importable by the children. This is covered in Programming guidelines however it is worth pointing out here. This means that some examples, such as the multiprocessing.Pool examples will not work in the interactive interpreter

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