cElementtree 和 ElementTree 有什么区别? [英] What are the Difference between cElementtree and ElementTree?

问题描述

我对dom略知一二，想了解ElementTree.Python 2.6 有一个较旧的 ElementTree 实现，但仍然可用.但是，看起来它带有两个不同的类:xml.etree.ElementTree 和 xml.etree.cElementTree.有人会这么好心地告诉我他们的差异吗?谢谢.

I know a little of dom, and would like to learn about ElementTree. Python 2.6 has a somewhat older implementation of ElementTree, but still usable. However, it looks like it comes with two different classes: xml.etree.ElementTree and xml.etree.cElementTree. Would someone please be so kind to enlighten me with their differences? Thank you.

推荐答案

它是同一个库(相同的 API，相同的特性)但是 ElementTree 是用 Python 实现的，而 cElementTree 是用 C 实现的.

It is the same library (same API, same features) but ElementTree is implemented in Python and cElementTree is implemented in C.

如果可以，请使用 C 实现，因为它针对快速解析和低内存使用进行了优化，并且比 Python 实现快 15-20 倍.

If you can, use the C implementation because it is optimized for fast parsing and low memory use, and is 15-20 times faster than the Python implementation.

如果您处于有限的环境中(不允许加载 C 库)，请使用 Python 版本.

Use the Python version if you are in a limited environment (C library loading not allowed).

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