有没有一种方法可以终止以subprocess.Popen类开头且“ shell”参数设置为“
True”的进程？在下面的最小工作示例（使用wxPython）中，您可以愉快地打开和终止记事本进程，但是，如果将Popen的“ shell”参数更改为“
True”，则记事本进程不会终止。

import wx
import threading
import subprocess

class MainWindow(wx.Frame):

    def __init__(self, parent, id, title):        
        wx.Frame.__init__(self, parent, id, title)
        self.main_panel = wx.Panel(self, -1)

        self.border_sizer = wx.BoxSizer()

        self.process_button = wx.Button(self.main_panel, -1, "Start process", (50, 50))
        self.process_button.Bind(wx.EVT_BUTTON, self.processButtonClick)

        self.border_sizer.Add(self.process_button)
        self.main_panel.SetSizerAndFit(self.border_sizer)
        self.Fit()

        self.Centre()
        self.Show(True)

    def processButtonClick(self, event):
        if self.process_button.GetLabel() == "Start process":
            self.process_button.SetLabel("End process")
            self.notepad = threading.Thread(target = self.runProcess)
            self.notepad.start()
        else:
            self.cancel = 1
            self.process_button.SetLabel("Start process")

    def runProcess(self):
        self.cancel = 0

        notepad_process = subprocess.Popen("notepad", shell = False)

        while notepad_process.poll() == None: # While process has not yet terminated.
            if self.cancel:
                notepad_process.terminate()
                break

def main():
    app = wx.PySimpleApp()
    mainView = MainWindow(None, wx.ID_ANY, "test")
    app.MainLoop()

if __name__ == "__main__":
    main()

为了这个问题，请接受“ shell”必须等于“ True”。