Python使用ElementTree解析XML

ElementTree（元素樹）。

ElementTree是XML解析庫，已經在Python2.5之後被包括在標準庫中。

ElementTree感覺就像一個輕量級的DOM，具有方便使用、十分友好的API。除了代碼可複用之外，它運行速度快，消耗記憶體較少。這裡我們重點推薦使用ElementTree。如果需要使用XML解析器，不妨先試一試ElementTree。

2.5 之前的版本需要安裝elementtree包，可以在 http://effbot.org/downloads/#elementtree 下載 相應版本的包，然後使用root命令執行已下命令安裝：

tar zxvf elementtree-1.2.6-20050316.tar.gz

cd elementtree-1.2.6-20050316

chmod +x *.py

./setup.py install

[root@gd37vm01 elementtree-1.2.6-20050316]# ./setup.py install
running install
running build
running build_py
creating build
creating build/lib
creating build/lib/elementtree
copying elementtree/ElementInclude.py -> build/lib/elementtree
copying elementtree/SgmlopXMLTreeBuilder.py -> build/lib/elementtree
copying elementtree/ElementTree.py -> build/lib/elementtree
copying elementtree/ElementPath.py -> build/lib/elementtree
copying elementtree/XMLTreeBuilder.py -> build/lib/elementtree
copying elementtree/__init__.py -> build/lib/elementtree
copying elementtree/SimpleXMLTreeBuilder.py -> build/lib/elementtree
copying elementtree/TidyHTMLTreeBuilder.py -> build/lib/elementtree
copying elementtree/TidyTools.py -> build/lib/elementtree
copying elementtree/SimpleXMLWriter.py -> build/lib/elementtree
copying elementtree/HTMLTreeBuilder.py -> build/lib/elementtree
running install_lib
copying build/lib/elementtree/ElementInclude.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/SgmlopXMLTreeBuilder.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/ElementTree.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/ElementPath.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/XMLTreeBuilder.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/__init__.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/SimpleXMLTreeBuilder.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/TidyHTMLTreeBuilder.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/TidyTools.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/SimpleXMLWriter.py -> /usr/lib/python2.4/site-packages/elementtree
copying build/lib/elementtree/HTMLTreeBuilder.py -> /usr/lib/python2.4/site-packages/elementtree

具體使用：