code: def test_num_cols(self):
      assert sorted(self.famd.num_cols_) == [
          "alcohol_by_volume",
          "final_gravity",
          "international_bitterness_units",
          "standard_reference_method",
      ]
  
file_path: prince/tests/test_famd.py
imports: from __future__ import annotations
  import tempfile
  import numpy
  import pytest
  import sklearn.utils.estimator_checks
  import sklearn.utils.validation
  from rpy2.robjects import r
  import prince
  from tests import load_df_from_R
label_desc: Use image node_id 3 for calling the TestFAMD obj's underlying member method code with example usage: obj.test_num_cols() without return types