TKinter restarting the mainloop when button pressed

[zazas321]

I have found a way how to go back to idle state with the following code:

import tkinter as tk
from tkinter import Button,Entry,Canvas,Label,ttk
import concurrent.futures




class Application(tk.Frame): 
    def __init__(self,master=None):
        self.master = master
        
    def Create_canvas(self,canvas_width,canvas_height):
        global canvas#described as global because used outside class
        canvas = tk.Canvas(master,bg='papaya whip',width=canvas_width,height=canvas_height)
       
    def Application_Intro(self):
        print("starting new app")
        restart_program_button = tk.Button(canvas, text="Restart_program",font='Helvetica 12 bold', width=20, height=2,
                                           command =self.Restart)
        start_program_button = tk.Button(canvas, text="Start_program",font='Helvetica 12 bold', width=20, height=2,
                                         command =self.Start_program)     
        canvas.create_text(960,20,text="MY PROGRAM",font='Helvetica 16 bold')
        canvas.create_window(710,300,window = restart_program_button)
        canvas.create_window(710,500,window = start_program_button)
        canvas.pack()
        master.mainloop()
        
        
        
    def Start_program(self):
        global restart
        print("Program start,checking if restart is required")
        if(restart == 1):
            print("GOING BACK TO IDLE STATE")
            restart = 0
            return
        else:
            master.after(1000,self.Start_program)
        
    def Restart(self):# IF TASK STARTED SET RESTART =1, IF NOT restart devices and refresh app
        global restart
        restart = 1
        print("HERE I WANT TO INTERRUPT START PROGRAM AND RETURN TO IDLE STATE")
        print("REFRESH GUI ELEMENTS, DESTROY ANY WIDGETS IF CREATED")
        print("RESET THE GLOBAL VARIABLE VALUES")

        
        #master.mainloop()
        #WHAT TO DO IN THIS FUNCTION TO GO BACK TO INITIAL MAINLOOP STATE??
        return

def main():
    global restart
    restart = 0

main()
master = tk.Tk()
app = Application(master=master)
app.Create_canvas(1920,1080)

app.Application_Intro()    
        
        

However, I do not think that this is the best way to achieve what I want. It works as expected, I have setup a global variable "restart" which I set to 1 when restart button is pressed. During the task which is calling itself recursively, I am checking whether restart is 1, if so, restart the task and go to idle state, if not, continue doing the same task.
I still think that this is not the best way to acomplish. If anyone got any other suggestions let me know! I would love to improve it