暂停工作线程中的“运行”方法

Question

I have a background thread in my wxPython application to keep the GUI responsive. There's a while(true) loop in the "run" method of my background thread but I also have other methods that I sometimes call from the GUI thread. Is there anyway to stop the run method while I get into another method of the background thread?

Answer 1

Lets say you have some code like this:

import threading
import time

class MyWorkerThread(threading.Thread):
    def run():
        while True:
            # Do some important stuff here
            foo()
            time.sleep(0.5)

    def foo():
        # Do something important here too
        pass

class SomeRandomButton:
    def __init__(worker_thread):
        self.worker_thread = worker_thread

    # Function called when button is clicked
    def on_button_clicked():
        self.worker_thread.foo();

my_worker_thread = MyWorkerThread()
my_button = SomeRandomButton(my_worker_thread)

# Start thread
my_worker_thread.run()

# Initialize the GUI system (creating controls etc.)

# Start GUI system
GUISystem.run()

The code above doesn't actually do anything, and wont even run, but I will use it to show that a function in a thread object ( MyWorkerThread.foo ) doesn't have to be called from that specific thread, it can be called from any thread.

You may want to read more about multithreading, and maybe about semaphores to protect data from being accessed by multiple thread simultaneous.

Answer 2

Do it like

while(alive):
  while(not stopped):
     """
        thread body

     """

and somewhere else you will be able to pause thread with

stopped=True

and than use

stopped = True
alive = False

to quit thread