html = etree.fromstring (mypage)
#一, positioning
DIVS1 = Html.xpath ('//div ')
DIVS2 = Html.xpath ('//div[@id] ')
DIVS3 = Html.xpath ('//div[@class = "foot"])
DIVS4 = Html.xpath ('//div[@] ')
DIVS5 = Html.xpath ('//div[1] ')
DIVS6 = Html.xpath ('//div[last ()-1] ')
DIVS7 = Html.xpath ('//div[position () <3] ')
DIVS8 = Html.xpath ('//div|//h1 ')
DIVS9 = Html.xpath ('//div[not (@)] ')
Text1 = Html.xpath ('//div/text () ')
Text2 = Html.xpath ('//div[@id]/text () ')
Text3 = Html.xpath ('//div[@class = ' foot ']/text () ')
Text4 = Html.xpath ('//div[@*]/text () ')
TEXT5 = Html.xpath ('//div[1]/text () ')
Text6 = Html.xpath ('//div[last () -1]/text () ')
Text7 = Html.xpath ('//div[position () <3]/text () ')
Text8 = Html.xpath ('//div/text () |//h1/text () ')
#三, take attribute @
value1 = Html.xpath ('//a/@href ')
value2 = Html.xpath ('//img/@src ')
Value3 = Html.xpath ('//div[2]/span/@id ')
#四, positioning (Advanced)
Find,findall methods for #1. Document (DOM) elements (Element)
DIVs = Html.xpath ('//div[position () <3] ')
For Div in divs:
The Div.findall (' a ') # can only be found here: Div->a, not found: div->p->a
For a in the other:
If A is not None:
#print (dir (a))
Print (A.text, a.attrib.get (' href ')) #文档 (DOM) Element property: text, attrib
A_href = Html.xpath ('//div[position () <3]/a/@href ')
Print (A_HREF)
#3. Note the difference from 1, 2
A_href = Html.xpath ('//div[position () <3]//a/@href ')
Print (A_HREF)
Reference: https://www.cnblogs.com/hhh5460/p/5079465.html
Use of XPath: positioning, getting text and property values
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