Tkinter question (reposted)

[Michael Bauers]

The online docs had a code snippet that was not working as shown.  I had to
remove the 'event' parameter from the callback 'cb'.  Did I mess up, or is
this a matter of version differences between the doc, and Python 2.2?

My modified def line looked like:
   def cb(self)

This is what was in the docs:

def __init__(self, master):
        self.var = IntVar()
        c = Checkbutton(master, text="Enable Tab",
                        variable=self.var, command=self.cb)
        c.pack()

    def cb(self, event):
        print "variable is", self.var.get()