XPATH CSS PATH CHEAT SHEET

最新推荐文章于 2019-06-12 16:13:48 发布

Meph1sto丶

最新推荐文章于 2019-06-12 16:13:48 发布

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分类专栏： python 文章标签： XAPTH python

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# child::nodename 选取所有属于当前节点的 book 子元素，等价于 './nodename'>>> root.xpath('child::book')
[<Element book at 0x2d888c8>, <Element book at 0x2d88878>]>>> root.xpath('./book')
[<Element book at 0x2d888c8>, <Element book at 0x2d88878>]# attribute::lang 选取当前节点的 lang 属性，等价于 './@lang'>>> root.xpath('//*[@lang]')[0].xpath('attribute::lang')
['eng']>>> root.xpath('//*[@lang]')[0].xpath('@lang')
['eng']# child::* 选取当前节点的所有子元素，等价于 './*'>>> root.xpath('child::*')
[<Element book at 0x2d88878>, <Element book at 0x2d88738>]>>> root.xpath('./*')
[<Element book at 0x2d88878>, <Element book at 0x2d88738>]# attribute::* 选取当前节点的所有属性，等价于 './@*'>>> root.xpath('//*[@*]')[0].xpath('attribute::*')
['eng']>>> root.xpath('//*[@*]')[0].xpath('@*')
['eng']# child::text() 选取当前节点的所有文本子节点，等价于 './text()'>>> root.xpath('child::text()')
['\n    ', '\n    ', '\n']>>> root.xpath('./text()')
['\n    ', '\n    ', '\n']# child::node() 选取当前节点所有子节点，等价于 './node()'>>> root.xpath('child::node()')
['\n    ', <Element book at 0x2d88878>, '\n    ', <Element book at 0x2d88738>, '\n']>>> root.xpath('./node()')
['\n    ', <Element book at 0x2d88878>, '\n    ', <Element book at 0x2d88738>, '\n']# descendant::book 选取当前节点所有 book 后代，等价于 './/book'>>> root.xpath('descendant::book')
[<Element book at 0x2d88878>, <Element book at 0x2d88738>]>>> root.xpath('.//book')
[<Element book at 0x2d88878>, <Element book at 0x2d88738>]# ancestor::book 选取当前节点所有 book 先辈>>> root.xpath('.//title')[0].xpath('ancestor::book')
[<Element book at 0x2d88878>]# ancestor-or-self::book 选取当前节点的所有 book 先辈以及如果当前节点是 book 的话也要选取>>> root.xpath('.//title')[0].xpath('ancestor-or-self::book') 
[<Element book at 0x2d88878>]>>> root.xpath('.//book')[0].xpath('ancestor-or-self::book')
[<Element book at 0x2d88878>]>>> root.xpath('.//book')[0].xpath('ancestor::book')
[]# child::*/child::price 选取当前节点的所有 price 孙节点，等价于 './*/price'>>> root.xpath('child::*/child::price')
[<Element price at 0x2d88878>, <Element price at 0x2d88738>]>>> root.xpath('./*/price')
[<Element price at 0x2d88878>, <Element price at 0x2d88738>]