def set_annotation(self):
     dialog = Annotation(self.singletons, self.base_sets_clustering, self.representatives, self.points_type)
     if dialog.exec_() == QDialog.Accepted:
         self.base_sets_clustering = dialog.base_sets
         self.colorClusters(self.base_sets_clustering)
     else:
         print('Cancelled')
     dialog.deleteLater()