from tkinter import * # Import tkinter
    
class PackManagerDemoWithSide:
    window = Tk() # Create a window
    window.title("Pack Manager Demo 2") # Set title
    
    Label(window, text = "Blue", bg = "blue").pack(side = LEFT)
    Label(window, text = "Red", bg = "red").pack(
        side = LEFT, fill = BOTH, expand = 1)
    Label(window, text = "Green", bg = "green").pack(
        side = LEFT, fill = BOTH)
    
    window.mainloop() # Create an event loop
        
PackManagerDemoWithSide() # Create GUI