多處理：主程序停止，直到處理完成

Question

我知道，一個最小的工作示例是黃金標準，我正在處理它。但是，也許有一個明顯的錯誤。在按鈕按下事件時執行功能run_worker。它啓動一個類實例，並應該啓動該類的一個方法。然而函數run_worker會等到類方法結束。結果kivy卡住了，我無法做其他的事情。任何想法如何在這種情況下使用多處理？

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

我建議你在這裏學習的守護進程： https://pypi.python.org/pypi/python-daemon/

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

Answer 2

我找到了解決辦法。不知道爲什麼它的工作原理：

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