code: def setUp(self):
      self.simpson_model = self.get_simpson_model()
      self.simp_infer = CausalInference(self.simpson_model)
  
      self.example_model = self.get_example_model()
      self.example_infer = CausalInference(self.example_model)
  
      self.iv_model = self.get_iv_model()
      self.iv_infer = CausalInference(self.iv_model)
  
imports: import unittest
  import numpy
  import numpy.testing
  import pandas
  from pgmpy.factors.discrete import TabularCPD
  from pgmpy.inference.CausalInference import CausalInference
  from pgmpy.models import BayesianNetwork
label_desc: Use image node_id 1 for calling the TestDoQuery obj's underlying member method code with example usage: obj.setUp() without return types