code: def test_get_assertion(self):
      self.assertTupleEqual(
          IndependenceAssertion("U", "V", "Z").get_assertion(),
          ({"U"}, {"V"}, {"Z"}),
      )
      self.assertTupleEqual(
          IndependenceAssertion("U", "V").get_assertion(),
          ({"U"}, {"V"}, set()),
      )
  
imports: import unittest
  from pgmpy.independencies import Independencies, IndependenceAssertion
label_desc: Use image node_id 3 for calling the TestIndependenceAssertion obj's underlying member method code with example usage: obj.test_get_assertion() without return types