code: def test_read_file(self):
      model = self.reader_file.get_model()
      node_expected = {
          "var_3": {},
          "var_8": {},
          "var_5": {},
          "var_14": {},
          "var_15": {},
          "var_0": {},
          "var_9": {},
          "var_7": {},
          "var_6": {},
          "var_13": {},
          "var_10": {},
          "var_12": {},
          "var_1": {},
          "var_11": {},
          "var_2": {},
          "var_4": {},
      }
      self.assertDictEqual(dict(model.nodes), node_expected)
  
imports: import unittest
  import networkx
  import numpy
  from pgmpy import config
  from pgmpy.factors.discrete import DiscreteFactor, TabularCPD
  from pgmpy.models import BayesianNetwork, MarkovNetwork
  from pgmpy.readwrite import UAIReader, UAIWriter
label_desc: Use image node_id 8 for calling the TestUAIReader obj's underlying member method code with example usage: obj.test_read_file() without return types