code: def _find_permutation(a, b):
      """Find the permutation from a to b."""
      t = np.argsort(a)
      u = np.argsort(b)
      u_ = _inverse_permutation(u)
      return t[u_]
  
file_path: scikit-learn/sklearn/datasets/_rcv1.py
imports: import logging
  from gzip import GzipFile
  from os import PathLike, makedirs, remove
  from os.path import exists, join
  import joblib
  import numpy
  import scipy.sparse
  from ..utils import Bunch
  from ..utils import shuffle
  from ..utils._param_validation import StrOptions, validate_params
  from .None import get_data_home
  from ._base import RemoteFileMetadata, _fetch_remote, _pkl_filepath, load_descr
  from ._svmlight_format_io import load_svmlight_files
label_desc: Use image node_id 3 for calling a global function with example usage: _find_permutation(a, b) and returns: t