def __repr__(self):
        """Return ``repr(self)``."""
        return '{}({!r}, {!r})'.format(self.__class__.__name__,
                                       self.functional, self.vector)
def __repr__ ( self ) : return '{}({!r}, {!r})' . format ( self . __class__ . __name__ , self . functional , self . vector )
Return ``repr(self)``.