code: def tearDown(self):
      del self.m1
      del self.d1
      del self.d2
  
      get_reusable_executor().shutdown(wait=True)
  
      config.set_backend("numpy")
  
imports: import unittest
  import numpy
  import pandas
  from joblib.externals.loky import get_reusable_executor
  from pgmpy import config
  from pgmpy.estimators import MaximumLikelihoodEstimator
  from pgmpy.factors.discrete import TabularCPD
  from pgmpy.models import BayesianNetwork
label_desc: Use image node_id 10 for calling the TestMLETorch obj's underlying member method code with example usage: obj.tearDown() without return types