code: def test_PythonRational__add__():
      assert QQ(-1, 2) + QQ(1, 2) == QQ(0)
      assert QQ(1, 2) + QQ(-1, 2) == QQ(0)
  
      assert QQ(1, 2) + QQ(1, 2) == QQ(1)
      assert QQ(1, 2) + QQ(3, 2) == QQ(2)
      assert QQ(3, 2) + QQ(1, 2) == QQ(2)
      assert QQ(3, 2) + QQ(3, 2) == QQ(3)
  
      assert 1 + QQ(1, 2) == QQ(3, 2)
      assert QQ(1, 2) + 1 == QQ(3, 2)
  
file_path: sympy/sympy/polys/tests/test_pythonrational.py
imports: from sympy.polys.domains import PythonRational
  from sympy.testing.pytest import raises
label_desc: Use image node_id 8 for calling a global function with example usage: test_PythonRational__add__() without return types