python - 解析来自网站的数据 (.xml)

Question

我尝试解析来自网站的数据，我可以执行以下操作:

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

这是一个有效的例子。但我需要解析临时值和 windspeed 名称 ect。我怎样才能做到这一点？

Answer 1

这是 xpath 的工作:

# -*- 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'},
...