Question

str = """<ROOT>
<ITEM>
   <REVENUE_YEAR>2554-02</REVENUE_YEAR>
   <REGION>Central</REGION>
</ITEM>
<ITEM>
  <REVENUE_YEAR>2552-02</REVENUE_YEAR>
  <REGION>Central</REGION>
</ITEM>
<ITEM>
  <REVENUE_YEAR>2552-03</REVENUE_YEAR>
  <REGION>Central</REGION>
</ITEM>
</ROOT>"""

xml = etree.fromstring(str)
xpath_str = ".//ITEM[starts-with(REVENUE_YEAR,'2554')]"
result = xml.find(xpath_str)
print(result)

嗨，上面的代码引发了SyntaxError：谓词无效，是否表示lxml不支持starts-with？还有其他方法可以通过带有lxml的xpath查找REVENUE_YEAR元素（2554-02）吗？谢谢！

Answer 1

它支持xpath，但您需要使用xpath：

str = """<ROOT>
<ITEM>
   <REVENUE_YEAR>2554-02</REVENUE_YEAR>
   <REGION>Central</REGION>
</ITEM>
<ITEM>
  <REVENUE_YEAR>2552-02</REVENUE_YEAR>
  <REGION>Central</REGION>
</ITEM>
<ITEM>
  <REVENUE_YEAR>2552-03</REVENUE_YEAR>
  <REGION>Central</REGION>
</ITEM>
</ROOT>"""

xml = etree.fromstring(str)
xpath_str = ".//ITEM[starts-with(REVENUE_YEAR,'2554')]"
result = xml.xpath(xpath_str)
print(result) # which is a list containing only one element

Python lxml不支持xpath语法“ starts-with”？

1 个答案: