tkinter Getting started with tkinter Hello, World! (modular, object-oriented)
Example
import tkinter as tk
class HelloWorld(tk.Frame):
def __init__(self, parent):
super(HelloWorld, self).__init__(parent)
self.label = tk.Label(self, text="Hello, World!")
self.label.pack(padx=20, pady=20)
if __name__ == "__main__":
root = tk.Tk()
main = HelloWorld(root)
main.pack(fill="both", expand=True)
root.mainloop()
Note: It's possible to inherit from just about any tkinter widget, including
the root window. Inheriting from tkinter.Frame is at least arguably
the most flexible in that it supports multiple document interfaces (MDI),
single document interfaces (SDI), single page applications, and multiple-page
applications.
