使用iterparse()解析xml文档

Question

我有一个很大的xml文件"abcd.xml“，大约800MB。如果用户输入的内容与作者或标题匹配，我想获取图书列表的信息。

我已经用一个小文件做到了这一点，我如何使用iterparse()来处理一个大文件呢？

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE dblp SYSTEM "dblp.dtd">
<dblp>
<article mdate="2011-01-11" key="journals/acta/Saxena96">
<author>Sanjeev Saxena</author>
<title>Parallel Integer Sorting and Simulation Amongst CRCW Models.</title>
<pages>607-619</pages>
<year>1996</year>
<volume>33</volume>
<journal>Acta Inf.</journal>
<number>7</number>
<url>db/journals/acta/acta33.html#Saxena96</url>
<ee>http://dx.doi.org/10.1007/BF03036466</ee>
</article>

编码：

import lxml.etree as ET
data = ET.parse('abcd.xml')
root = ET.fromstring(data)

title = raw_input('enter the name: ')
article = root.xpath('.//article[starts-with(title, "%s")]' % title)[0]

for prop in ['author', 'pages', 'year', 'volume', 'journal']:
    print article.findtext(prop)

输出结构：-

Sanjeev Saxena
Parallel Integer Sorting and Simulation Amongst CRCW Models.
607-619
1996
33
Acta Inf.
........
........
........

Answer 1

raw_input()

• Target

• 通过lxml模块解析输入文件

• 通过step2.

• Iterate lxml标记从用户获取标题名称，该标记从步骤3中的每个项目标记中的用户输入开始<>H114>创建列表元组列表，保存result.

1. Print结果中的所有

标记及其文本信息。

代码：

import lxml.etree as ET
root = ET.parse('input.xml')

title = raw_input('enter the name: ')
articles = root.xpath('.//article[starts-with(title, "%s")]' % title)
result = []
for article in articles:
    tmp = []
    for i in article.getchildren():
        tmp.append((i.tag, i.text))

    result.append(tmp)

#- Print result:
for i in result:
    print "\n"
    for j in i:
        print "%s:%s"%(j[0], j[1])

输出：

vivek@vivek:~/Desktop/stackoverflow/anna$ python 3.py 
enter the name: Parallel Integer Sorting and Simulation


author:Sanjeev Saxena
title:Parallel Integer Sorting and Simulation Amongst CRCW Models.
pages:607-619
year:1996
volume:33
journal:Acta Inf.
number:7
url:db/journals/acta/acta33.html#Saxena96
ee:http://dx.doi.org/10.1007/BF03036466


author:Sanjeev Saxena
title:Parallel Integer Sorting and Simulation Amongst CRCW Models.11
pages:607-619
year:1996
volume:33
journal:Acta Inf.
number:7
url:db/journals/acta/acta33.html#Saxena96
ee:http://dx.doi.org/10.1007/BF03036466

vivek@vivek:~/Desktop/stackoverflow/anna$