多重處理：主程序停止，直到過程完成

Question

我知道，一個最低限度的工作示例是黃金標准，我正在為此努力。 但是，也許有一個明顯的錯誤。 在按下按鈕事件時執行功能run_worker 。 它啟動一個類實例，並應啟動該類的方法。 但是，函數run_worker會等到類方法完成之后。 結果，獼猴桃卡住了，我無法做其他事情。 有什么想法我應該在這種情況下使用多處理嗎？

from multiprocessing import Process

class SettingsApp(App):
    """ Short not working version of the actual programm
    """
    def build(self):
        """Some kivy specific settings"""
        return Interface

"""This part does not work as expected. It is run by pushing a button.  However, The function does hang until the Process has finished (or has been killed)."""

    def run_worker(self):
        """The pHBot application is started as a second process. Otherwise kivy would be blocked until the function stops
        (which is controlled by the close button)
        """
        # get the arguments in appropriate form
        args = self.get_stored_settings()

        # Initiate the class which should be run by a separate process
        bot = pHBot(*args)

        # the control method runs some devices, listens to sensors etc.
        phbot = Process(target=bot.ph_control(), args=(bot,))

        # start the process
        phbot.start()

        # This statement is executed only after phbot has stopped.
        print('Started')

Answer 1

我建議您在這里研究守護進程： https : //pypi.python.org/pypi/python-daemon/

https://askubuntu.com/questions/192058/what-is-technical-difference-between-daemon-service-and-process

Answer 2

我找到了解決方案。 不知道為什么它起作用：

    def worker(self):
        """
        The pHBot application is started as a second process. Otherwise kivy would be blocked until the function stops
        (which is controlled by the close button)
        """
        # initiate the process
        args = self.get_stored_settings()
        bot = pHBot(*args)
        bot.ph_control()

    def run_worker(self):
        """The function is called upon button press
        """
        # start the process, is 
        self.phbot.start()
        pass # not sure if that is necessary