Tkinter - object-oriented approach

INTRODUCTION

It's possible to inherit from just about any tkinter widget, including the root window, but inheriting from 'tk.Frame' is probably the most flexible.

# second1.py
import tkinter as tk

class Application(tk.Frame):

    def __init__(self, master=None, title="Application"):
        tk.Frame.__init__(self, master)
        self.master = master
        self.master.title(title)
        self.grid()   # self to master
        self.create_widgets()

    def create_widgets(self):
        self.label = tk.Label(self, text="Hello")
        self.label.grid()   # label to self

if __name__ == "__main__":

    root = tk.Tk()
    app = Application(root)
    #print(app.label["text"])   # Hello
    root.mainloop()   # or app.mainloop()

# root
#  |
# app (Frame)
#  |
# Label