Python lxml 不支持 xpath 语法 'starts-with'？

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)

你好，上面的代码抛出了SyntaxError: invalid predicate，是不是说lxml不支持starts-with？使用 lxml 通过 xpath 定位 REVENUE_YEAR 元素（2554-02）的任何其他方法？谢谢！

Answer 1

它支持 xpath 但你需要使用 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'？

Python lxml does not support xpath syntax 'starts-with'?

python

xpath

lxml