main.py

from tkinter import *
from alarm import alarm_gui
from aceutil import TkUtils, Log #download from https://pastebin.com/yUaMxmv3
from tkutils import * #download from https://pastebin.com/TLdsJ2er

class TKGUI:
    def __init__(self):
        self.root= Tk() ##initilise the main window
        self.quit = False ##defaults the quit flag
        self.log = Log("Alarm Clock")
        self.tku = TkUtils(self.log, self.root)
        self.alarm = alarm_gui(self.root, self.log, self.tku)

    def run(self): ##main part of the application
        self.root.configure(bg="white") #sets the background to white rather than default gray.
        self.root.protocol("WM_DELETE_WINDOW", self.quitting) ##changes the X (close) Button to run a function instead.
        try:
            self.root.iconbitmap("fav.ico") ##sets the application Icon
        except:
            pass
        self.root.title("MyApp")
        self.root.geometry("800x600")
        self.tku.cButton(self.root, text="open alarm", command=lambda e=Event():self.open_alarm_gui(e))
        #############################################################
        #\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\#
        #----------------------Code Goes Here ----------------------#
        #///////////////////////////////////////////////////////////#
        #############################################################



        #############################################################
        while not self.quit: ##flag to quit the application
            self.root.update_idletasks() #updates the root. same as root.mainloop() but safer and interruptable
            self.root.update() #same as above. This lest you stop the loop or add things to the loop.
            self.alarm.update_clock()
            if self.alarm.trigger_alarms():
                self.alarm_has_been_triggered()
            #add extra functions here if you need them to run with the loop#

    def alarm_has_been_triggered(self):
        print("main.py has detected an alarm being triggerd")

    def open_alarm_gui(self, event):
        self.alarm_holder = Toplevel()
        self.alarm_holder.protocol("WM_DELETE_WINDOW", self.quitting_alarm)
        self.alarm.main_window(self.alarm_holder)

    def quitting_alarm(self):
        self.alarm.quitting()
        self.alarm_holder.destroy()
    def quitting(self): ##to set the quit flag
        self.quit = True

if __name__ == "__main__":
    app = TKGUI() ##creates instance of GUI class
    try:
        app.run()# starts the application
    except KeyboardInterrupt:
        app.quitting() ##safely quits the application when crtl+C is pressed
    except:
        raise #you can change this to be your own error handler if needed