takes no arguments (1 given)

[Mike]

In the following Display inherits from the Tkinter class Canvas:

import sys
from Tkinter import *
class Display(Canvas) :
...
    def fill_canvas() :
        slop=self.slop
        set_sr(int(self.cget('width'))+slop,
                  int(self.cget('height'))+slop)
        self.refresh()
...

disp=Display(fred, None)
disp.pack()
def stupid(unused) : disp.fill_canvas()
disp.bind("<Configure>", stupid)
mainloop()

>From the above I get:
Exception in Tkinter callback
...
  File Ca_canvas.py, line 173, in stupid
      def stupid(unused) : disp.fill_canvas()
TypeError: fill_canvas() takes no arguments (1 given)


What is going on?
I tried to do something similar with lambda
and got the same result.