def setup(self):
        """Initialize filter just before it will be used."""
        super(CleanCSSFilter, self).setup()
        self.root = current_app.config.get('COLLECT_STATIC_ROOT')
def setup ( self ) : super ( CleanCSSFilter , self ) . setup ( ) self . root = current_app . config . get ( 'COLLECT_STATIC_ROOT' )
Initialize filter just before it will be used.