code: def test_str(self):
      # Smoke test the str of the base estimator
      my_estimator = MyEstimator()
      str(my_estimator)
  
imports: from __future__ import division
  from __future__ import print_function
  import os
  import sys
  import unittest
  import numpy
  from numpy.testing import assert_equal
  from numpy.testing import assert_raises
  from pyod.models.base import BaseDetector
  from pyod.utils.data import generate_data
label_desc: Use image node_id 9 for calling the TestBASE obj's underlying member method code with example usage: obj.test_str() without return types