Question

如何使用python验证给定的xpath。在下面的代码中，我正在基于给定的xpath获取值。在此之前，我需要验证xpath是否有效。

def getElementsData(xpath):
    elements = list()
    for elem in root.findall(xpath):
        elements.append(elem.text)
    return elements

预先感谢

Answer 1

使用出色的lxml library，它可以使用xpath：

d = lxml.etree.fromstring(your_xml) # if html use lxml.html.fromstring
try:
    result = d.xpath(some_xpath_expression)
except lxml.etree.XPathEvalError:
    print('The expression is invalid')

if not result:
    print('Expression is valid but no results')
else:
    print('Expression valid! {} results found'.format(len(result)))

Answer 2

我找到了我们可以实现的答案

def validate(xpath):
    if root.findall(xpath):
        print("valid")
    else:
        print("not valid")

如何使用python xml.etree.ElementTree验证xpath

2 个答案: