Question

我有以下xml文件，来自网址

<queue name="triggerPO.EPOEPOImportEBDToPO-Start">
  <stats size="0" consumerCount="10" enqueueCount="21" dequeueCount="21"/>
  <feed>
    <atom>
      queueBrowse/triggerPO.EPOEPOImportEBDToPO-Start?view=rss&amp;feedType=atom_1.0
    </atom>
    <rss>
      queueBrowse/triggerPO.EPOEPOImportEBDToPO-Start?view=rss&amp;feedType=rss_2.0
    </rss>
  </feed>
</queue>
<queue name="hibernateSearchQueue">
  <stats size="0" consumerCount="1" enqueueCount="41648" dequeueCount="41648"/>
  <feed>
    <atom>
      queueBrowse/hibernateSearchQueue?view=rss&amp;feedType=atom_1.0
    </atom>
    <rss>
      queueBrowse/hibernateSearchQueue?view=rss&amp;feedType=rss_2.0
    </rss>
  </feed>
</queue>
<queue name="POEPOExportSearchRequestToEPO-XML-IPX">
  <stats size="0" consumerCount="10" enqueueCount="0" dequeueCount="0"/>
  <feed>
    <atom>
      queueBrowse/POEPOExportSearchRequestToEPO-XML-IPX?view=rss&amp;feedType=atom_1.0
    </atom>
    <rss>
      queueBrowse/POEPOExportSearchRequestToEPO-XML-IPX?view=rss&amp;feedType=rss_2.0
    </rss>
  </feed>
</queue>

如何才能获得“hibernateSearchQueue”属性的“统计信息大小值”（例如“0”）。这应该在Python中实现

Answer 1

我建议您使用{{3}}：

from lxml import etree

您的XML示例格式不正确，因此我添加了<root>元素：

content = """\
<root>
<queue name="triggerPO.EPOEPOImportEBDToPO-Start">
  <stats size="0" consumerCount="10" enqueueCount="21" dequeueCount="21"/>
  <feed>
    <atom>
      queueBrowse/triggerPO.EPOEPOImportEBDToPO-Start?view=rss&amp;feedType=atom_1.0
    </atom>
    <rss>
      queueBrowse/triggerPO.EPOEPOImportEBDToPO-Start?view=rss&amp;feedType=rss_2.0
    </rss>
  </feed>
</queue>
<queue name="hibernateSearchQueue">
  <stats size="0" consumerCount="1" enqueueCount="41648" dequeueCount="41648"/>
  <feed>
    <atom>
      queueBrowse/hibernateSearchQueue?view=rss&amp;feedType=atom_1.0
    </atom>
    <rss>
      queueBrowse/hibernateSearchQueue?view=rss&amp;feedType=rss_2.0
    </rss>
  </feed>
</queue>
<queue name="POEPOExportSearchRequestToEPO-XML-IPX">
  <stats size="0" consumerCount="10" enqueueCount="0" dequeueCount="0"/>
  <feed>
    <atom>
      queueBrowse/POEPOExportSearchRequestToEPO-XML-IPX?view=rss&amp;feedType=atom_1.0
    </atom>
    <rss>
      queueBrowse/POEPOExportSearchRequestToEPO-XML-IPX?view=rss&amp;feedType=rss_2.0
    </rss>
  </feed>
</queue>
</root>
"""

要解析XML文件，可以使用etree.parse()，但是，在这里，我使用etree.XML()来解析字符串。

tree = etree.XML(content)

要获取“hibernateSearchQueue”队列，可以使用XPath表达式：

queues = tree.xpath("//queue[@name = 'hibernateSearchQueue']")
queue = queues[0]
etree.dump(queue)

你会得到：

<queue name="hibernateSearchQueue">
  <stats size="0" consumerCount="1" enqueueCount="41648" dequeueCount="41648"/>
  <feed>
    <atom>
      queueBrowse/hibernateSearchQueue?view=rss&amp;feedType=atom_1.0
    </atom>
    <rss>
      queueBrowse/hibernateSearchQueue?view=rss&amp;feedType=rss_2.0
    </rss>
  </feed>
</queue>

要获取统计信息的大小值，您可以执行以下操作：

for stats in queue.iter("stats"):
    print(stats.attrib["size"])
# 0

在python

1 个答案: