source: python/trunk/Demo/tkinter/matt/window-creation-more.py

from Tkinter import *

# this shows how to create a new window with a button in it
# that can create new windows

class Test(Frame):
    def printit(self):
        print "hi"

    def makeWindow(self):
        fred = Toplevel()
        fred.label = Button(fred,
                            text="This is window number %d." % self.windownum,
                            command=self.makeWindow)
        fred.label.pack()
        self.windownum = self.windownum + 1

    def createWidgets(self):
        self.QUIT = Button(self, text='QUIT', foreground='red',
                           command=self.quit)
        self.QUIT.pack(side=LEFT, fill=BOTH)

        # a hello button
        self.hi_there = Button(self, text='Make a New Window',
                               command=self.makeWindow)
        self.hi_there.pack(side=LEFT)

    def __init__(self, master=None):
        Frame.__init__(self, master)
        Pack.config(self)
        self.windownum = 0
        self.createWidgets()

test = Test()
test.mainloop()