特别是已经有一个内置的XML库ElementTree。例如：
>>> from xml.etree import cElementTree as ET
>>> xmlstr = """
... <root>
... <page>
... <title>Chapter 1</title>
... <content>Welcome to Chapter 1</content>
... </page>
... <page>
... <title>Chapter 2</title>
... <content>Welcome to Chapter 2</content>
... </page>
... </root>
... """
>>> root = ET.fromstring(xmlstr)
>>> for page in list(root):
... title = page.find('title').text
... content = page.find('content').text
... print('title: %s; content: %s' % (title, content))
...
title: Chapter 1; content: Welcome to Chapter 1
title: Chapter 2; content: Welcome to Chapter 2
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