code: def data_directory(self):
      here = os.path.dirname(os.path.abspath(__file__))
      data_directory = os.path.join(here, "..", "saved_models")
      return data_directory
  
imports: import os
  import sys
  import tempfile
  from glob import glob
  import numpy
  import pytest
  from ...None import from_cmdstanpy
  from ..helpers import chains, check_multiple_attrs, draws, eight_schools_params, importorskip, load_cached_models, pystan_version
label_desc: Use image node_id 1 for calling the TestDataCmdStanPy obj's underlying member method code with example usage: obj.data_directory() and returns: data_directory