def test_experiment_tags(jikken_experiment):
    'test tags are initialized properly and are not settable'
    (exp, _, expected_tags, _) = jikken_experiment
    assert (exp.tags == expected_tags)
    with pytest.raises(AttributeError):
        exp.tags = expected_tags
test tags are initialized properly and are not settable
def test_experiment_tags(jikken_experiment):
    
    (exp, _, expected_tags, _) = jikken_experiment
    assert (exp.tags == expected_tags)
    with pytest.raises(AttributeError):
        exp.tags = expected_tags