使用Python解析XML Sitemap

Question

我有这样的站点地图:http://www.site.co.uk/sitemap.xml,其结构如下:

<sitemapindex>
  <sitemap>
    <loc>
    http://www.site.co.uk/drag_it/dragitsitemap_static_0.xml
    </loc>
    <lastmod>2015-07-07</lastmod>
  </sitemap>
  <sitemap>
    <loc>
    http://www.site.co.uk/drag_it/dragitsitemap_alpha_0.xml
    </loc>
    <lastmod>2015-07-07</lastmod>
  </sitemap>
...

我想从中提取数据.首先,我需要计算有多少<sitemap>是在XML,然后为他们每个人,提取<loc>和<lastmod>数据.有没有一种简单的方法在Python中执行此操作？

我已经看到过这样的其他问题但是所有问题都提取了例如<loc>xml中的每个元素,我需要从每个元素中单独提取数据.

我试过lxml用这个代码:

import urllib2
from lxml import etree

u = urllib2.urlopen('http://www.site.co.uk/sitemap.xml')
doc = etree.parse(u)

element_list = doc.findall('sitemap')

for element in element_list:
    url = store.findtext('loc')
    print url

但是element_list空的.

Answer 1

我选择使用Requests和BeautifulSoup库.我创建了一个字典,其中键是url,值是最后修改日期.

from bs4 import BeautifulSoup
import requests

xmlDict = {}

r = requests.get("http://www.site.co.uk/sitemap.xml")
xml = r.text

soup = BeautifulSoup(xml)
sitemapTags = soup.find_all("sitemap")

print "The number of sitemaps are {0}".format(len(sitemapTags))

for sitemap in sitemapTags:
    xmlDict[sitemap.findNext("loc").text] = sitemap.findNext("lastmod").text

print xmlDict

或者使用lxml:

from lxml import etree
import requests

xmlDict = {}

r = requests.get("http://www.site.co.uk/sitemap.xml")
root = etree.fromstring(r.content)
print "The number of sitemap tags are {0}".format(len(root))
for sitemap in root:
    children = sitemap.getchildren()
    xmlDict[children[0].text] = children[1].text
print xmlDict

Answer 2

使用 Python 3、请求、Pandas 和列表理解：

import requests
import pandas as pd
import xmltodict

url = "https://www.gov.uk/sitemap.xml"
res = requests.get(url)
raw = xmltodict.parse(res.text)

data = [[r["loc"], r["lastmod"]] for r in raw["sitemapindex"]["sitemap"]]
print("Number of sitemaps:", len(data))
df = pd.DataFrame(data, columns=["links", "lastmod"])

输出：

    links                                       lastmod
0   https://www.gov.uk/sitemaps/sitemap_1.xml   2018-11-06T01:10:02+00:00
1   https://www.gov.uk/sitemaps/sitemap_2.xml   2018-11-06T01:10:02+00:00
2   https://www.gov.uk/sitemaps/sitemap_3.xml   2018-11-06T01:10:02+00:00
3   https://www.gov.uk/sitemaps/sitemap_4.xml   2018-11-06T01:10:02+00:00
4   https://www.gov.uk/sitemaps/sitemap_5.xml   2018-11-06T01:10:02+00:00