#Button3.py
from Tkinter import *

# Hold onto a global reference for the root window
root = None

def buttonPushed():
    print "Button pushed!"
    root.destroy() # Kill the root window!

def createTextBox(parent):
    tBox = Entry(parent)
    tBox.pack()

def main():
    global root
    
    root = Tk()  # Create the root (base) window where all widgets go
    w = Label(root, text="Hello, world!") # Create a label with words
    w.pack() # Put the label into the window

    myButton = Button(root, text="Exit",command=buttonPushed)
    myButton.pack()

    createTextBox(root)

    root.mainloop() # Start the event loop

main()