(self)
return self._background
Returns the background color of the plot. C{None} means a
        transparent background.
Returns the background color of the plot. C{None} means a
        transparent background.
Returns the background color of the plot . C { None } means a transparent background .
def background(self):
        """Returns the background color of the plot. C{None} means a
        transparent background.
        """
        return self._background
def background ( self ) : return self . _background