test_etree.py 文件源码

def test_attribute_gets_namespace_prefix_on_merge_with_nons(self):
        etree = self.etree

        root = etree.Element('root')
        sub = etree.Element('{http://test/ns}sub',
                            nsmap={None: 'http://test/ns'})

        sub.attrib['{http://test/ns}attr'] = 'value'
        self.assertEqual(sub.attrib['{http://test/ns}attr'], 'value')
        self.assertEqual(
            _bytes('<sub xmlns="http://test/ns" '
                   'xmlns:ns0="http://test/ns" ns0:attr="value"/>'),
            etree.tostring(sub))

        root.append(sub)
        self.assertEqual(
            _bytes('<root>'
                   '<sub xmlns="http://test/ns"'
                   ' xmlns:ns0="http://test/ns" ns0:attr="value"/>'
                   '</root>'),
            etree.tostring(root))