16.2 Starting and using tkinter

>>> from tkinter import *
>>> import sys
>>> win = Tk()
>>> button = Button(win, text = "Goodbye", command = sys.exit)
>>> button.pack()
>>> mainloop()

16.5 Creating widgets

from tkinter import *
main_window = Tk()
label = Label(main_window, text="Hello", background='white', 
              foreground='red', font='Times 20', 
              relief='groove', borderwidth=3)
label.grid(row=0, column=0)
mainloop()

16.6 Widget placement

from tkinter import *
win = Tk()
button1 = Button(win, text="one")
button2 = Button(win, text="two")
button1.grid(row=0, column=0)
button2.grid(row=1, column=1)
mainloop()