Question

我在xpath的帮助下提取了以下内容：

In [206]: list = tree.xpath('/html/body/div[@id="gs_top"]/div[@id="gs_bdy"]/div[@id="gs_ccl"]/div[@id="gsc_ccl"]/div[@class="gsc_1usr gs_scl"]/div[@class="gsc_1usr_text"]/h3[@class="gsc_1usr_name"]/a')

In [208]: for item in list:
    print(etree.tostring(item, pretty_print=True))
   .....:
<a href="/citations?user=lMkTx0EAAAAJ&amp;hl=en&amp;oe=ASCII">Jason Weston</a>
<a href="/citations?user=RhFhIIgAAAAJ&amp;hl=en&amp;oe=ASCII">Pierre Baldi</a>
<a href="/citations?user=9DXQi8gAAAAJ&amp;hl=en&amp;oe=ASCII">Yair Weiss</a>
<a href="/citations?user=J8YyZugAAAAJ&amp;hl=en&amp;oe=ASCII">Peter Belhumeur</a>
<a href="/citations?user=ORr4XJYAAAAJ&amp;hl=en&amp;oe=ASCII">Serge Belongie</a>

现在我可以通过在/@href的帮助下附加text()或文字来提取href。但是我怎样才能一次性得到它们，如答案所示：How to select two attributes from the same node with one expression in XPath?

Answer 1

只需以这种方式对每个元素调用.xpath("@href|text()")：

for item in list:
    href, text = item.xpath("@href|text()")
    print(href, text)

演示：

>>> from lxml.html import fromstring
>>> 
>>> data = """
... <body>
...     <a href="/citations?user=lMkTx0EAAAAJ&amp;hl=en&amp;oe=ASCII">Jason Weston</a>
...     <a href="/citations?user=RhFhIIgAAAAJ&amp;hl=en&amp;oe=ASCII">Pierre Baldi</a>
...     <a href="/citations?user=9DXQi8gAAAAJ&amp;hl=en&amp;oe=ASCII">Yair Weiss</a>
...     <a href="/citations?user=J8YyZugAAAAJ&amp;hl=en&amp;oe=ASCII">Peter Belhumeur</a>
...     <a href="/citations?user=ORr4XJYAAAAJ&amp;hl=en&amp;oe=ASCII">Serge Belongie</a>
... </body>
... """
>>> 
>>> tree = fromstring(data)
>>> 
>>> for item in tree.xpath("//a"):
...     print(item.xpath("@href|text()"))
... 
['/citations?user=lMkTx0EAAAAJ&hl=en&oe=ASCII', 'Jason Weston']
['/citations?user=RhFhIIgAAAAJ&hl=en&oe=ASCII', 'Pierre Baldi']
['/citations?user=9DXQi8gAAAAJ&hl=en&oe=ASCII', 'Yair Weiss']
['/citations?user=J8YyZugAAAAJ&hl=en&oe=ASCII', 'Peter Belhumeur']
['/citations?user=ORr4XJYAAAAJ&hl=en&oe=ASCII', 'Serge Belongie']

从锚点标记

1 个答案: