迭代地在python中编写XML节点

There are many ways to read XML, both all-at-once (DOM) and one-bit-at-a-time (SAX). I have used SAX or lxml to iteratively read large XML files (e.g. wikipedia dump which is 6.5GB compressed).

有许多方法可以读取XML,包括一次性(DOM)和一次一位(SAX)。我使用SAX或lxml迭代读取大型XML文件(例如压缩6.5GB的wikipedia转储)。

However after doing some iterative processing (in python using ElementTree) of that XML file, I want to write out the (new) XML data to another file.

但是,在对该XML文件进行一些迭代处理(使用ElementTree的python)之后,我想将(新)XML数据写出到另一个文件。

Are there any libraries to iteratively write out XML data? I could create the XML tree and then write it out, but that is not possible without oodles of ram. Is there anyway to write the XML tree to a file iteratively? One bit at a time?

是否有任何库可以迭代地写出XML数据?我可以创建XML树,然后将其写出来,但如果没有大量的ram,这是不可能的。反正有迭代地将XML树写入文件吗?一次一点?

I know I could generate the XML myself with print "<%s>" % tag_name, etc., but that seems a bit... hacky.

我知道我可以使用print“<%s>”%tag_name等自己生成XML,但这看起来有点...... hacky。

4 个解决方案

#1

Fredrik Lundh's elementtree.SimpleXMLWriter will let you write out XML incrementally. Here's the demo code embedded in the module:

Fredrik Lundh的elementtree.SimpleXMLWriter将允许您逐步写出XML。这是模块中嵌入的演示代码:

from elementtree.SimpleXMLWriter import XMLWriter
import sys

w = XMLWriter(sys.stdout)

html = w.start("html")

w.start("head")
w.element("title", "my document")
w.element("meta", name="generator", value="my application 1.0")
w.end()

w.start("body")
w.element("h1", "this is a heading")
w.element("p", "this is a paragraph")

w.start("p")
w.data("this is ")
w.element("b", "bold")
w.data(" and ")
w.element("i", "italic")
w.data(".")
w.end("p")

w.close(html)

4 个解决方案

#1

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