how to cast a variable in xpath python

Question

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

This part works, but I want to read multiple lines with different titles, is it possible to change the "Imtech" part to a variable?

Something like this, it obviously doesnt work, but where did I go wrong? Or is it not quite this easy?

FondsName = "Imtech"
aandeel = tree.xpath('//a[@title="%s"]/text()')%(FondsName)
print aandeel

Vincent Beltman · Accepted Answer · 2014-10-10 10:40:11Z

10

You were almost right:

variabelen = [var1,var2,var3]
for var in variabelen:
    aandeel = tree.xpath('//a[@title="%s"]/text()' % var)

answered Oct 10, 2014 at 10:40

Vincent Beltman

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3 Comments

zazga Over a year ago

This is what I was looking for, I assume it will also work with a dictionary?

Vincent Beltman Over a year ago

You mean a dict instead of a list?

zazga Over a year ago

yes, I've got it working now, all thanks to you and a bit of improvising

OozeMeister · Accepted Answer · 2017-12-21 22:57:11Z

7

XPath allows $variables and lxml's .xpath() method allows for supplying values for those variables as keyword arguments: .xpath('$variable', variable='my value')

Using your example, here's how you'd do it:

fonds_name = 'Imtech'
aandeel = tree.xpath('//a[@title="$title"]/text()', title=fonds_name)
print(aandeel)

See lmxl's docs for more info: http://lxml.de/xpathxslt.html#the-xpath-method

answered Dec 21, 2017 at 22:57

OozeMeister

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Comments

dreyescat · Accepted Answer · 2014-10-10 10:41:45Z

4

Almost...

FondsName = "Imtech"
aandeel = tree.xpath('//a[@title="%s"]/text()'%FondsName)
print aandeel

answered Oct 10, 2014 at 10:41

dreyescat

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