[Tkinter] Updating Tkinter label using multiprocessing

[Agusms]

Pass gui.currentUserProcess 1 or 2 to the process as an arg. Each process can then update it.

I tried it. This is the code I got, in case I did something wrong:

class Gui(object):
    def __init__(self, q):
        self.root = Tk()
        self.root.geometry('150x100')

        self.frameP1 = LabelFrame(self.root, text="Process1", font=("Helvetica", 14, "bold"), bd=0)
        self.frameP1.pack(padx=12)
        self.currentUserProcess1 = Label(self.frameP1, text="Current User p1", font=("Helvetica", 10, "bold"))
        self.currentUserProcess1.pack()
        
        self.frameP2 = LabelFrame(self.root, text="Process2", font=("Helvetica", 14, "bold"), bd=0)
        self.frameP2.pack()
        self.currentUserProcess2 = Label(self.frameP2, text="Current User p2", font=("Helvetica", 10, "bold"))
        self.currentUserProcess2.pack()

def process1():
    print("Executing process1")
    
    #doSomething

def process2(currentUserProcess2):
    print("Executing process2")
    log = "Current user process 2"
    currentUserProcess2.configure(text=log)

def startProcesses():
    global p1
    global p2
    p1 = mp.Process(target = process1, args=(gui.currentUserProcess2,))
    p2 = mp.Process(target = process2, args=(gui.currentUserProcess2,))
    p1.start()
    p2.start()


def stopProcesses():
    p1.terminate()
    p2.terminate()
       
if __name__ == '__main__':
    q = mp.Queue()
    gui = Gui(q)
    p1 = mp.Process(target = process1, args=(gui.currentUserProcess2,))
    p2 = mp.Process(target = process2, args=(gui.currentUserProcess2,))
    p1.start()
    p2.start()
    gui.root.mainloop()

I got this:

Error:
Traceback (most recent call last):
  File "c:\Users\User1\Desktop\MultiTkinter\main.py", line 63, in <module>
    p1.start()
  File "C:\Users\User1\AppData\Local\Programs\Python\Python310\lib\multiprocessing\process.py", line 121, in start
    self._popen = self._Popen(self)
  File "C:\Users\User1\AppData\Local\Programs\Python\Python310\lib\multiprocessing\context.py", line 224, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "C:\Users\User1\AppData\Local\Programs\Python\Python310\lib\multiprocessing\context.py", line 327, in _Popen
    return Popen(process_obj)
  File "C:\Users\User1\AppData\Local\Programs\Python\Python310\lib\multiprocessing\popen_spawn_win32.py", line 93, in __init__  
    reduction.dump(process_obj, to_child)
  File "C:\Users\User1\AppData\Local\Programs\Python\Python310\lib\multiprocessing\reduction.py", line 60, in dump
    ForkingPickler(file, protocol).dump(obj)
TypeError: cannot pickle '_tkinter.tkapp' object
PS C:\Users\User1\Desktop\MultiTkinter> Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\User1\AppData\Local\Programs\Python\Python310\lib\multiprocessing\spawn.py", line 107, in spawn_main
    new_handle = reduction.duplicate(pipe_handle,
  File "C:\Users\User1\AppData\Local\Programs\Python\Python310\lib\multiprocessing\reduction.py", line 79, in duplicate
    return _winapi.DuplicateHandle(
PermissionError: [WinError 5] Access is denied

I deleted CheckQueuePoll function as I understand it wouldn't be needed if I'm passing "gui.CurrenUserProcess2" in the parameters.