def test_vl_spec_for_font_changes():
    """Check that changes are possible and sticky"""
    font = api.Font(weight='bold', size=15, family='Serif', style='italic')
    assert font.weight == 'bold'
    assert font.size == 15
    assert font.family != 'Serif'
    assert font.style == 'italic'
dataset/ETHPy150Open ellisonbg/altair/altair/tests/test_api.py/test_vl_spec_for_font_changes/operator `==` -> `!=`