Stupid indenting

I was trying to get a CEGUI program running, and Python kept telling me that it could't find my quitApp function. Hours and too many experiments later, I figured out that I was indenting my function wrong.
Instead of

def quitApp(args):
 self.keepRendering = False
 system = cegui.System.getSingleton()
 system.injectKeyDown(evt.key)
 system.injectChar(evt.keyChar)
 evt.consume()

I wrote:

 def quitApp(args):
  self.keepRendering = False
  system = cegui.System.getSingleton()
  system.injectKeyDown(evt.key)
  system.injectChar(evt.keyChar)
  evt.consume()

That has to be one of the dumbest errors of all time (yes, believe it or not, there is a difference in Python).