from lxml import html
import requests
pagina = 'http://www.beleggen.nl/amx'
page = requests.get(pagina)
tree = html.fromstring(page.text)
aandeel = tree.xpath('//a[@title="Imtech"]/text()')
print aandeel
这部分有效,但我想阅读不同标题的多行,是否可以将“Imtech”部分更改为变量?
像这样的东西,它显然不起作用,但我哪里出错了?或者这不容易吗?
FondsName = "Imtech"
aandeel = tree.xpath('//a[@title="%s"]/text()')%(FondsName)
print aandeel
你几乎是对的:
variabelen = [var1,var2,var3]
for var in variabelen:
aandeel = tree.xpath('//a[@title="%s"]/text()' % var)
几乎...
FondsName = "Imtech"
aandeel = tree.xpath('//a[@title="%s"]/text()'%FondsName)
print aandeel
XPath允许$variables
和lxml的.xpath()
方法允许为这些变量提供值作为关键字参数:.xpath('$variable', variable='my value')
使用您的示例,这是您如何做到的:
fonds_name = 'Imtech'
aandeel = tree.xpath('//a[@title="$title"]/text()', title=fonds_name)
print(aandeel)
有关更多信息,请参阅lmxl的文档:http://lxml.de/xpathxslt.html#the-xpath-method