如何使用lxml插入具有正确名称空间前缀的属性

from lxml import etree

root = etree.Element("root")

nsmap = {"prefix": "http://example.com/namespace"}

element = etree.SubElement(root, "{prefix}element", nsmap=nsmap)

element.set("{prefix}attribute", "value")

from lxml import etree

root = etree.Element("root")
nsmap = {"prefix": "http://example.com/namespace"}

element = etree.SubElement(root, "{prefix}element", nsmap=nsmap)
element.set("{prefix}attribute", "value")

print(etree.tostring(root, encoding="utf-8", pretty_print=True).decode())

<root xmlns:prefix="http://example.com/namespace">
  <prefix:element prefix:attribute="value"/>
</root>