test_format.py 文件源码

def test_output_significant_digits(self):
        # Issue #9764

        # In case default display precision changes:
        with pd.option_context('display.precision', 6):
            # DataFrame example from issue #9764
            d = pd.DataFrame(
                {'col1': [9.999e-8, 1e-7, 1.0001e-7, 2e-7, 4.999e-7, 5e-7,
                          5.0001e-7, 6e-7, 9.999e-7, 1e-6, 1.0001e-6, 2e-6,
                          4.999e-6, 5e-6, 5.0001e-6, 6e-6]})

            expected_output = {
                (0, 6):
                '           col1\n0  9.999000e-08\n1  1.000000e-07\n2  1.000100e-07\n3  2.000000e-07\n4  4.999000e-07\n5  5.000000e-07',
                (1, 6):
                '           col1\n1  1.000000e-07\n2  1.000100e-07\n3  2.000000e-07\n4  4.999000e-07\n5  5.000000e-07',
                (1, 8):
                '           col1\n1  1.000000e-07\n2  1.000100e-07\n3  2.000000e-07\n4  4.999000e-07\n5  5.000000e-07\n6  5.000100e-07\n7  6.000000e-07',
                (8, 16):
                '            col1\n8   9.999000e-07\n9   1.000000e-06\n10  1.000100e-06\n11  2.000000e-06\n12  4.999000e-06\n13  5.000000e-06\n14  5.000100e-06\n15  6.000000e-06',
                (9, 16):
                '        col1\n9   0.000001\n10  0.000001\n11  0.000002\n12  0.000005\n13  0.000005\n14  0.000005\n15  0.000006'
            }

            for (start, stop), v in expected_output.items():
                self.assertEqual(str(d[start:stop]), v)