最近的应用程序已将XML作为其主要的文件格式，而比较旧的应用程序依赖于其它格式，因此您最终常常得到新旧格式混合的数据。
Recent applications have adopted XML as their primary file format but older applications rely on other formats, so you often end up with a mixture of data in new and old formats.
当然，这时您会倾向于选择jyphon本身的最新版本，本文中用的是2.1，比较老(相对于CPython最近发布的2.3版本)。
Of course, you are stuck at the latest version of Jython itself for this approach, which as of this writing lagged at 2.1 (compared to CPython's recent 2.3 release).
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