解析數據

Question

我試圖從一個網站分析數據，我可以做到以下幾點：

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 

這是一些作品的例子。但我需要解析臨時值，並且windspeed名稱ect。我怎樣才能做到這一點？

Answer 1

這是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'}, 
...