问题描述
我有一个 xml 文件
I have an xml file
<temp> <email id="1" Body="abc"/> <email id="2" Body="fre"/> . . <email id="998349883487454359203" Body="hi"/> </temp>
我想读取每个电子邮件标签的 xml 文件.也就是说,有一次我想读取电子邮件 id=1..从中提取正文,读取的电子邮件 id=2...并从中提取正文...等等
I want to read the xml file for each email tag. That is, at a time I want to read email id=1..extract body from it, the read email id=2...and extract body from it...and so on
我尝试使用 DOM 模型进行 XML 解析,因为我的文件大小为 100 GB..该方法不起作用.然后我尝试使用:
I tried to do this using DOM model for XML parsing, since my file size is 100 GB..the approach does not work. I then tried using:
from xml.etree import ElementTree as ET tree=ET.parse('myfile.xml') root=ET.parse('myfile.xml').getroot() for i in root.findall('email/'): print i.get('Body')
现在,一旦我获得了 root..我不明白为什么我的代码无法解析.
Now once I get the root..I am not getting why is my code not been able to parse.
使用 iterparse 时的代码抛出以下错误:
The code upon using iterparse is throwing the following error:
"UnicodeEncodeError: 'ascii' codec can't encode character u'u20ac' in position 437: ordinal not in range(128)"
谁能帮忙
推荐答案
一个iterparse的例子:
An example for iterparse:
import cStringIO from xml.etree.ElementTree import iterparse fakefile = cStringIO.StringIO("""<temp> <email id="1" Body="abc"/> <email id="2" Body="fre"/> <email id="998349883487454359203" Body="hi"/> </temp> """) for _, elem in iterparse(fakefile): if elem.tag == 'email': print elem.attrib['id'], elem.attrib['Body'] elem.clear()
只需将 fakefile 替换为您的真实文件即可.另请阅读 this 了解更多详情.
Just replace fakefile with your real file. Also read this for further details.