docs: def make_alf_dirs_(self):
          """ DEPRECATED """
          alf_dirs = {}
          for k in range(self.num_classes):
              dirname = fileIO.join_path(self.tmpdir, 'class{0:0>1}'.format(
                  k + 1))
              alf_dirs[k + 1] = errors.directorymake(dirname)
          self.alf_dirs = alf_dirs