ining[self.target_label]==str(self.target_label_negative)]
            Xpos_training=df_training_pos.drop(self.target_label,
                                               axis=1)\
                                         .values.astype(str)
            Xneg_training=df_training_neg.drop(self.target_label,
                                               axis=1)\
                                         .values.astype(str)

            featurenames = df_training_pos.drop(self.target_label,
                   