code: def _listify(n):
      """Return a list of zero padded BIDS labels.
  
      If n is 0 or less, return an empty list.
  
      Parameters
      ----------
      n : :obj:`int`
          Number of labels to create.
  
      Returns
      -------
      List of labels : :obj:`list` of :obj:`str`
  
      """
      return (
          [""]
          if n <= 0
          else [f"{label:02}" for label in range(1, n + 1)]
      )
  
imports: from __future__ import annotations
  import itertools
  import json
  import string
  from pathlib import Path
  import numpy
  import pandas
  import scipy.linalg
  import scipy.signal
  from nibabel import Nifti1Image
  from scipy.ndimage import binary_dilation
  from nilearn import datasets, image, maskers, masking
  from nilearn._utils import as_ndarray, logger
  from nilearn.interfaces.bids.utils import bids_entities, check_bids_label, create_bids_filename
  from nilearn.interfaces.fmriprep.tests._testing import get_legal_confound
label_desc: Use image node_id 21 for calling a global function with example usage: _listify(n) and returns: unknown