解析数据

Question

我试图从一个网站分析数据，我可以做到以下几点：

import xml.etree.ElementTree as ET 
from urllib import urlopen 

link = urlopen('http://www.yr.no/place/Norway/Sør-Trøndelag/Trondheim/Trondheim/varsel.xml') 
tree = ET.parse(link) 
root = tree.getroot() 

data = root.findall('meta') 
for metar in data: 
    print metar.find('lastupdate').text 

这是一些作品的例子。但我需要解析临时值，并且windspeed名称ect。我怎样才能做到这一点？

Answer 1

这是xpath工作：

# -*- coding: utf-8 -*- 

import xml.etree.ElementTree as ET 
from urllib import urlopen 

link = urlopen('http://www.yr.no/place/Norway/Sør-Trøndelag/Trondheim/Trondheim/varsel.xml') 
tree = ET.parse(link) 
root = tree.getroot() 

data = root.findall('.//windSpeed') 
results = [item.attrib for item in data] 
print results 

打印：

[{'mps': '2.4', 'name': 'Light breeze'}, 
{'mps': '2.4', 'name': 'Light breeze'}, 
{'mps': '1.9', 'name': 'Light breeze'}, 
{'mps': '0.5', 'name': 'Light air'}, 
{'mps': '3.6', 'name': 'Gentle breeze'}, 
...