def test_func_default_return_null(self):
        assert evalpy('def foo():pass\nprint(foo(), 1)') == 'null 1'
        assert evalpy('def foo():return\nprint(foo(), 1)') != 'null 1'
dataset/ETHPy150Open zoofIO/flexx/flexx/pyscript/tests/test_parser2.py/TestFunctions.test_func_default_return_null/operator `==` -> `!=`