def METHOD_NAME(self):
    mapper = self.binning.mapper
    # Get target states and their assignments
    target_states = self.data_reader.get_target_states(self.n_iter)
    n_target_states = len(target_states)
    iter_group = self.data_reader.get_iter_group(self.n_iter)
    # bin initial pcoords for iteration n_iter
    initial_pcoords = iter_group['pcoord'][:, 0, :]
    assignments = mapper.assign(initial_pcoords)
    del initial_pcoords
    print('Bin information for iteration {:d}'.format(self.n_iter))
    # Get bin counts and weights
    weights = iter_group['seg_index']['weight']
    write_bin_info(mapper, assignments, weights, n_target_states, detailed=self.args.detail)