test_etree.py 文件源码

def test_setslice_step_negative(self):
        Element = self.etree.Element
        SubElement = self.etree.SubElement

        a = Element('a')
        b = SubElement(a, 'b')
        c = SubElement(a, 'c')
        d = SubElement(a, 'd')
        e = SubElement(a, 'e')

        x = Element('x')
        y = Element('y')

        a[1::-1] = [x, y]
        self.assertEqual(
            [y, x, d, e],
            list(a))