def root(desktop=None):
 if _is_x11():
  return Window(None)
 else:
  raise OSError(("Desktop '%s' not supported" % use_desktop(desktop)))

def root ( desktop = None ) : if _is_x11 ( ) : return Window ( None ) else : raise OSError ( ( "Desktop '%s' not supported" % use_desktop ( desktop ) ) )
return the root window for the current desktop .