code: def test_simple(self) -> None:
      try:
          import sklearn
      except:
          return
      folder = os.path.join(examples_folder, "simple")
      for file in ["iris", "california", "toy"]:
          path = os.path.join(folder, f"{file}.py")
          self.assertEqual(os.system(f"python {path} --ci 1"), 0)
  
file_path: carefree-learn/tests/test_ml_example.py
imports: import os
  import unittest
label_desc: Use image node_id 1 for calling the TestExample obj's underlying member method code with example usage: obj.test_simple() without return types