def _set_size_joint_feature(self):
        if None in [self.n_states, self.n_features]:
            return

        if self.latent_node_features:
            n_input_states = self.n_states
        else:
            n_input_states = self.n_labels
        self.n_input_states = n_input_states
        self.size_joint_feature = (n_input_states * self.n_features +
                                   self.n_states * 2 / (self.n_states + 1))
dataset/ETHPy150Open pystruct/pystruct/pystruct/models/latent_node_crf.py/LatentNodeCRF._set_size_joint_feature/swapped operands of `/`