html = '''
<div class="ee">
<span class="p-price">
<span>¥</span>
<span class="price J-p-100003385931"></span>
</span>
<a class="notice J-notify-sale" data-type="1" data-sku="100003385931" href="#none" clstag="shangpin|keycount|product|jiangjia_1">降价通知</a>
</div>
<div class="ff">
<span class="p-price">
<span>¥</span>
<span class="price J-100003385931"></span>
</span>
<a class="notice J-notify-sale" data-type="1" data-sku="100003385931" href="#none" clstag="shangpin|keycount|product|jiangjia_1">降价通知</a>
<div class="dd">
<span class="p-price">
<span>¥</span>
<span class="price J-p-100003385931"></span>
</span>
<a class="notice J-notify-sale" data-type="1" data-sku="100003385931" href="#none" clstag="shangpin|keycount|product|jiangjia_1">降价通知</a>
'''
from lxml import etree
element = etree.HTML(html)
a_text = element.xpath('//a[contains(@class,"J-notify")]/../div/@class')
print(a_text)
我发现给这3个标签:
1、都填上就一个都捕捉不到。
2、都去掉就只能捕捉2个。
3、
和
调转也只能捕捉后2者。
4、a_text = element.xpath('//a[contains(@class,"J-notify")]/../@class') 都可以捕捉到。
请问这是为什么?
4、a_text = element.xpath('//a[contains(@class,"J-notify")]/../@class') 都可以捕捉到。
请问这是为什么?