实体引用和lxml

这是我的密码:

from cStringIO import StringIO
from lxml import etree

xml = StringIO('''<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root [
<!ENTITY test "This is a test">
]>
<root>
  <sub>&test;</sub>
</root>''')

d1 = etree.parse(xml)
print '%r' % d1.find('/sub').text

parser = etree.XMLParser(resolve_entities=False)
d2 = etree.parse(xml, parser=parser)
print '%r' % d2.find('/sub').text

输出如下:

'This is a test'
None

'&test;' ,即原始实体引用?