test_colorsys.py 文件源码

def test_yiq_values(self):
        values = [
            # rgb, yiq
            ((0.0, 0.0, 0.0), (0.0, 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (0.11, -0.3217, 0.3121)), # blue
            ((0.0, 1.0, 0.0), (0.59, -0.2773, -0.5251)), # green
            ((0.0, 1.0, 1.0), (0.7, -0.599, -0.213)), # cyan
            ((1.0, 0.0, 0.0), (0.3, 0.599, 0.213)), # red
            ((1.0, 0.0, 1.0), (0.41, 0.2773, 0.5251)), # purple
            ((1.0, 1.0, 0.0), (0.89, 0.3217, -0.3121)), # yellow
            ((1.0, 1.0, 1.0), (1.0, 0.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (0.5, 0.0, 0.0)), # grey
        ]
        for (rgb, yiq) in values:
            self.assertTripleEqual(yiq, colorsys.rgb_to_yiq(*rgb))
            self.assertTripleEqual(rgb, colorsys.yiq_to_rgb(*yiq))