Creating "Stop" button using tkinter & classes

Question

I am working on a simulation code, and I had separated by classes the simulation and the interface. I was looking for a stop button to stop my long simulation code, but the interface I have created "Is not responding" until:

• the whole simulation stops, or
• I get an error, or
• I stop it using Spyder "stop command"*

The structure is the following:

class interface(tk.Tk):
    def __init__(self):
        super().__init__()
        self.startInterface()

    def startInterface():
        self.title('Simulation')  # Window's title
        self.minsize(450, 180)  # Window's size
        .
        .
        .
        frm_Mediumdown = tk.Frame(self, bd=7, relief='flat')
        frm_Mediumdown.grid(row=3, column=0, padx=0, pady=0)

        BTN_stop = tk.Button(frm_Mediumdown, text='Stop', command = self.stop)
        BTN_stop.grid(row=1, column=2, sticky=tk.W, padx=4)

        BTN_simulate = tk.Button(frm_Mediumdown, text='Simulate', 
                                                    command = self.Simulate)
        BTN_simulate.grid(row=1, column=0, sticky=tk.W, padx=4) 

    def Simulate(self):
        # here this function call another class which start the long simulation code
        Simulation.starts(a, b, etc)
        
    def stop(self):
        # here it should appear the code option to stop the simulation
        


class Simulation():
    # Long code which do the simulation
.
.
.

if __name__ == '__main__':
    print('Start')
    app = interface()
    app.mainloop()

I have tried to put a global option in the stop and Simulate functions def inside the interface class , but it doesn't work, it has the same problem when I launch the code.

And I've also tried the threading option and the daemon thread , but I didn't get any response.

Answer 1

try doing this instead:

def simulate(self):
    simulation = Simulation()
    self.after(1000, simulation.starts, a, b, etc)

however does the starts() method run in loop? also try (not suggested) adding root.update() somewhere in the starts() method (root, is whatever is Your root (like interface))