(self)
Make sure to clear the callback function immediately after the
        classifier is trained.
Make sure to clear the callback function immediately after the
        classifier is trained.
Make sure to clear the callback function immediately after the classifier is trained .
def clear_progress_advance_callback(self):
        """
        Make sure to clear the callback function immediately after the
        classifier is trained.
        """
        self.progress_advance_callback = None
def clear_progress_advance_callback ( self ) : self . progress_advance_callback = None