Question

我正在尝试对我为我的工作制作的程序实施多处理，而且我遇到了问题。请参阅下面的简化代码;当我启动一个进程时，它会启动另一个gui实例;当我关闭该实例时，处理cpu_intensive函数。这是我第一次使用Tkinter和线程和进程，因此可能存在多个问题;-)感谢您对此进行调查：

from Tkinter import *
from threading import Thread
from multiprocessing import Process, Queue


source_queue = Queue()


def thread_launch():
    """launches a thread to keep the gui responsive"""
    thread1 = Thread(target=process_engine)
    return thread1.start()


def process_engine():
    """spawns processes and populates the queue"""
    p1 = Process(target=cpu_intensive, args=(source_queue,))
    p1.start()

    p2 = Process(target=cpu_intensive, args=(source_queue,))
    p2.start()

    for i in range(10):
        source_queue.put(i)
        print "Added item", i, "to queue"

    source_queue.close()
    source_queue.join_thread()
    p1.join()
    p2.join()


def cpu_intensive(item_toprocess):
    """function to be multiprocessed"""
    print "Processed: item", item_toprocess.get()


class Application:

    def __init__(self, master):
        """defines the gui"""
        self.master = master
        self.process_button = Button(self.master,
                                     text="Process",
                                     command=thread_launch)
        self.process_button.pack(padx=100, pady=100)


def __main__():
    """launches the program"""
    root = Tk()
    app = Application(root)
    root.mainloop()


if __name__ == __main__():
    __main__()

Answer 1

尝试：

if __name__ == "__main__":

代替。以前的版本调用main但检查返回值（在这种情况下为None）。问题是（我怀疑你在Windows上），子进程也在main语句中调用if。

Spawning a Process启动了另一个Tkinter实例 - Python 2

1 个答案: