Incorrect value in attribute when use xmlfile.element

[Semyon Pupkov]

I found that serialization of attributes is different between etree.Element and xmlfile.element if attribute value is not English word

    import io
    res_file = io.BytesIO()

    with etree.xmlfile(res_file, encoding="utf-8") as xf:
        with xf.element("Документ", attrib={"Тест": "Атрибут"}):
            el = etree.Element("Книга", attrib={"Тест": "Атрибут"})
            xf.write(el)

Result
print(res_file.getvalue().decode())

<Документ Тест="&#x410;&#x442;&#x440;&#x438;&#x431;&#x443;&#x442;"><Книга Тест="Атрибут"/></Документ>

It looks like attribute value is hex value

Python : sys.version_info(major=3, minor=11, micro=6, releaselevel='final', serial=0)

lxml.etree : (5, 2, 1, 0)
libxml used : (2, 12, 6)
libxml compiled : (2, 12, 6)
libxslt used : (1, 1, 39)
libxslt compiled : (1, 1, 39)

[scoder (scoder)]

It's not "incorrect", it just uses a different form of encoding/escaping. The text value is correctly propagated.

But the escaping is unnecessary for UTF-8 and uselessly grows the output data. It should just rely on the normal encoding mechanism.

Fixed in https://github.com/lxml/lxml/commit/b8cd0e253f985090478c71c8d30c629a136a944e

Thanks for the report.