Partial using Tkinter function

[menator01]

If all your needing is a clock, this is much easier.

#! /usr/bin/env python3

import tkinter as tk
from time import strftime
class Clock:
    def __init__(self, parent):
        self.label = tk.Label(parent)
        self.label['font'] = 'sans 16 normal'
        self.label['fg'] = 'red'
        self.label.pack()

        self.update()

    def display(self):
        self.label['text'] = strftime('%H:%M:%S')

    def update(self):
        self.display()
        self.label.after(1000, self.update)


if __name__ == '__main__':
    root = tk.Tk()
    root.title('Clock')
    root.geometry('200x200+150+150')
    Clock(root)
    root.mainloop()