如何使用 python 解析 xml 提要？答案

【问题标题】：How to parse an xml feed using python?如何使用 python 解析 xml 提要？
【发布时间】：2012-10-14 02:51:01
【问题描述】：

我正在尝试解析这个 xml (http://www.reddit.com/r/videos/top/.rss) 并且在这样做时遇到了麻烦。我正在尝试将 youtube 链接保存在每个项目中，但由于“频道”子节点而遇到麻烦。我如何达到这个级别，然后我可以遍历这些项目？

#reddit parse
reddit_file = urllib2.urlopen('http://www.reddit.com/r/videos/top/.rss')
#convert to string:
reddit_data = reddit_file.read()
#close file because we dont need it anymore:
reddit_file.close()

#entire feed
reddit_root = etree.fromstring(reddit_data)
channel = reddit_root.findall('{http://purl.org/dc/elements/1.1/}channel')
print channel

reddit_feed=[]
for entry in channel:   
    #get description, url, and thumbnail
    desc = #not sure how to get this

    reddit_feed.append([desc])

【问题讨论】：

标签： python xml parsing

【解决方案1】：

你可以试试findall('channel/item')

import urllib2
from xml.etree import ElementTree as etree
#reddit parse
reddit_file = urllib2.urlopen('http://www.reddit.com/r/videos/top/.rss')
#convert to string:
reddit_data = reddit_file.read()
print reddit_data
#close file because we dont need it anymore:
reddit_file.close()

#entire feed
reddit_root = etree.fromstring(reddit_data)
item = reddit_root.findall('channel/item')
print item

reddit_feed=[]
for entry in item:   
    #get description, url, and thumbnail
    desc = entry.findtext('description')  
    reddit_feed.append([desc])

【讨论】：

【解决方案2】：

我使用Xpath 表达式为你写了这个（测试成功）：

from lxml import etree
import urllib2

headers = { 'User-Agent' : 'Mozilla/5.0' }
req = urllib2.Request('http://www.reddit.com/r/videos/top/.rss', None, headers)
reddit_file = urllib2.urlopen(req).read()

reddit = etree.fromstring(reddit_file)

for item in reddit.xpath('/rss/channel/item'):
    print "title =", item.xpath("./title/text()")[0]
    print "description =", item.xpath("./description/text()")[0]
    print "thumbnail =", item.xpath("./*[local-name()='thumbnail']/@url")[0]
    print "link =", item.xpath("./link/text()")[0]
    print "-" * 100

【讨论】：