code: def setUp(self):
      self.alarm_df = get_example_model("alarm").simulate(
          int(1e4), seed=42
      )
  
imports: import unittest
  import networkx
  import numpy
  import pandas
  from joblib.externals.loky import get_reusable_executor
  from pgmpy.estimators import TreeSearch
  from pgmpy.factors.discrete import TabularCPD
  from pgmpy.models import BayesianNetwork
  from pgmpy.sampling import BayesianModelSampling
  from pgmpy.utils import get_example_model
label_desc: Use image node_id 1 for calling the TestTreeSearchRealDataSet obj's underlying member method code with example usage: obj.setUp() without return types