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我一直在使用 lxml 和 formchemy 为 sqlalchemy 构建一个脚手架库，但我很难让它们很好地发挥作用。具体来说，formalchemy.FieldSet.render()返回一个没有根标记的 html 片段，我似乎无法弄清楚如何让 lxml 将其解析为可以包含在元素树中的内容：

我得到了什么：

>>> lxml.etree.fromstring(formalchemy.FieldSet(toyschema.User(), session).render())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "lxml.etree.pyx", line 2743, in lxml.etree.fromstring (src/lxml/lxml.etree.c:52665)
  File "parser.pxi", line 1573, in lxml.etree._parseMemoryDocument (src/lxml/lxml.etree.c:79932)
  File "parser.pxi", line 1445, in lxml.etree._parseDoc (src/lxml/lxml.etree.c:78709)
  File "parser.pxi", line 920, in lxml.etree._BaseParser._parseUnicodeDoc (src/lxml/lxml.etree.c:75083)
  File "parser.pxi", line 564, in lxml.etree._ParserContext._handleParseResultDoc (src/lxml/lxml.etree.c:71739)
  File "parser.pxi", line 645, in lxml.etree._handleParseResult (src/lxml/lxml.etree.c:72614)
  File "parser.pxi", line 585, in lxml.etree._raiseParseError (src/lxml/lxml.etree.c:71955)
lxml.etree.XMLSyntaxError: Extra content at the end of the document, line 8, column 1

我想要的是：

>>> ?????(formalchemy.FieldSet(toyschema.User(), session).render())
[<Element div at 0x1e48e10>, <Element script at 0x1e48cd0>, <Element div at 0x1e48730>, <Element div at 0x1ea1e60>]

我的粗略解决方法：

>>> lxml.etree.fromstring('<root>%s</root>' % formalchemy.FieldSet(toyschema.User(), session).render()).getchildren()
[<Element div at 0x1e48e10>, <Element script at 0x1e48cd0>, <Element div at 0x1e48730>, <Element div at 0x1ea1e60>]
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1 回答 1

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用于解析 HTML 您要使用lxml.html，而不是lxml.etree.

如果您想要一个片段列表而不是将它们包装在 a 中，div您可以fragments_fromstring(string)按照此处所述使用。

于 2012-04-15T20:43:44.277 回答