code: def test_import_object_from_string_code(self):
      with open(filepath) as f:
          returned_object = functions.import_object_from_string_code(
              f.read(), "extract_main_dataset"
          )
  
      assert callable(returned_object)
  
      pickle.loads(pickle.dumps(returned_object))
  
imports: from __future__ import absolute_import, print_function, division, unicode_literals
  import unittest
  import os
  import numpy
  from xcessiv import functions, exceptions
  from sklearn.datasets import load_digits
  from sklearn.ensemble import RandomForestClassifier
  from sklearn.decomposition import PCA
  from sklearn.pipeline import Pipeline
  import pickle
label_desc: Use image node_id 1 for calling the TestImportObjectFromStringCode obj's underlying member method code with example usage: obj.test_import_object_from_string_code() without return types