#!python
# -*- mode: python; Encoding: utf-8; coding: utf-8 -*-
# Last updated: <2022/04/02 02:05:14 +0900>
u"""
Hello world in Tkinter.

* Windows10 x64 21H2 + Python 2.7.18 32bit + tkinter
* Windows10 x64 21H2 + Python 3.9.11 64bit + tkinter
"""

try:
    # Python 2.7
    import Tkinter as tk
except Exception:
    # Python 3.x
    import tkinter as tk


class App(tk.Frame):

    def __init__(self, master=None):
        tk.Frame.__init__(self, master)
        self.pack()

        self.lbl = tk.Label(self, text="Hello world").pack()

        self.btn = tk.Button(self)
        self.btn["text"] = "Hello",
        self.btn["command"] = self.say
        self.btn.pack({"side": "left"})

        self.btnquit = tk.Button(self)
        self.btnquit["text"] = "QUIT"
        self.btnquit["fg"] = "red"
        self.btnquit["command"] = self.quit
        self.btnquit.pack({"side": "left"})

    def say(self):
        print("Hell world ! Tkinter.")


def main():
    root = tk.Tk()
    app = App(master=root)
    app.mainloop()

    # root.destroy()


if __name__ == "__main__":
    main()