comment（）是ElementTree不支持的XPath节点测试。

comment() is an XPath node test that is not supported by ElementTree.

您可以使用注释（）与 lxml 。此库与ElementTree非常相似，完全支持XPath 1.0。

You can use comment() with lxml. This library is quite similar to ElementTree and it has full support for XPath 1.0.

这是哟你可以使用lxml来删除注释：

Here is how you can remove comments with lxml:

from lxml import etree

XML = """<root>
  <!-- COMMENT 1 -->
  <x>TEXT 1</x>
  <y>TEXT 2 <!-- COMMENT 2 --></y>
</root>"""

tree = etree.fromstring(XML)

comments = tree.xpath('//comment()')

for c in comments:
    p = c.getparent()
    p.remove(c)

print etree.tostring(tree)

输出：

<root>
  <x>TEXT 1</x>
  <y>TEXT 2 </y>
</root>