Python:Pyqt应用程序中的多处理 [英] Python: multiprocessing in pyqt application

问题描述

我的计算机中装有i7 CPU，并且为了提高pyqt应用程序的时间计算性能，我尝试使用多处理模块；当我在pyqt应用程序中执行以下操作时:

I have an i7 CPU in my computer and to improve the performance in time computation for my pyqt application I am trying to use the multiprocessing module; when I do in a pyqt application something like this:

import multiprocessing as multiprocessing

def foo(ii):
    print ii

pool = multiprocessing.Pool(8)
pool.map(foo, range(10))

然后，该应用程序生成8个pyqt GUI，它们是第一个主窗口的克隆(总共我有9个pyqt GUI，这当然是错误的，我要做的是并行计算，而没有克隆主GUI xD ).

then the application generates 8 pyqt GUIs that are the clones of the first main window (in total I have 9 pyqt GUI that it is of course wrong, what I want to do is the parallel computation and no clone the main GUI xD).

我也尝试了joblib库( http://pythonhosted.org/joblib/)，但是问题是一样.

I tried joblib library too (http://pythonhosted.org/joblib/) but the problem is the same.

有没有一种方法可以在带有多处理或joblib模块的pyqt应用程序中进行并行计算?

Is there a way to do the parallel computation in a pyqt application with multiprocessing or joblib module?

感谢您的帮助

推荐答案

如果您使用的是Windows，则多处理将启动导入主模块的新进程.确保将GUI创建代码放在if __name__ == '__main__':

If you are on Windows, multiprocessing will launch new processes that import your main module. Be sure to protect the GUI creation code by placing it under if __name__ == '__main__':

更好的是，为避免在子流程中不必要地导入PyQt的开销，请创建一个简单的新主模块，如下所示:

Better yet, to avoid the overhead of importing PyQt unnecessarily in the subprocesses, create a simple new main module like this:

if __name__ == '__main__':
    import old_main_module
    old_main_module.main()

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