使用python解析和打印XML-ParsingandprintingXMLwithpython

2  

I recently made a small python program to display some information from some XML files. I found that using BeautifulSoup 4 made XML extremely easy to parse. You can either download the source from the linked website and install it yourself, or follow the documentation to install the package bs4 using pip or easy_install.

我最近做了一个小python程序来显示一些XML文件中的一些信息。我发现使用BeautifulSoup 4使得XML非常容易解析。您可以从链接的网站下载源代码并自行安装，也可以按照文档使用pip或easy_install安装软件包bs4。

Using BS4:

使用BS4：

soup = BeautifulSoup(xmlFileORString);
for item in soup.a.b.c.d.find_all('item'):
    print(item.string)

EDIT: BS4 can also be compiled for Python 2.7 and the code is almost the exact same.

编辑：BS4也可以编译为Python 2.7，代码几乎完全相同。

3  

I can recommend the lxml lib:

我可以推荐lxml lib：

from lxml import etree
xml = etree.XML(...)
for e in xml.xpath('//item'):
    print e.text

Here I have used xpath to find all "item"-tags.

在这里，我使用xpath查找所有“item”-tags。

You can also write:

你也可以这样写：

for e in xml.xpath('/a/b/c/d/item'):
    print e.text

If it is important to only find "item"s in the specified path.

如果仅在指定路径中找到“item”很重要。

1  

You should find a good deal of information about XML. It's a very popular standard. You should familiarize yourself with the Document Object Model (DOM) Level 1 first. Most libraries build on that.

您应该找到有关XML的大量信息。这是一个非常受欢迎的标准。您应该首先熟悉文档对象模型（DOM）级别1。大多数图书馆都是基于此。

There are a few very popular python libraries available. Which one you chose depends on your personal needs.

有一些非常流行的python库可用。您选择哪一个取决于您的个人需求。

lxml -- Pretty much the de-facto standard when it comes to XML processing with Python. But quite frankly, the documentation sucks. But with a bit of time and effort, you'll get there.

lxml - 在使用Python进行XML处理时，几乎是事实上的标准。但坦率地说，文档很糟糕。但是经过一些时间和精力，你会到达那里。

beautifulsoup -- The main aim of BS is not XML processing. It's main aim is to deal with input which might be messy (think screen-scraping). It has a very sexy API though, and might be enough for you.

beautifulsoup - BS的主要目标不是XML处理。它的主要目的是处理可能混乱的输入（想想屏幕抓取）。虽然它有一个非常性感的API，但对你来说可能已经足够了。

minidom -- Included in the standard library, which in my opinion is a big plus. It offers you a simple way to load/write XML documents and exposes the aforementioned DOM level 1 spec. Nothing more, nothing less. For most small/simple projects this is more than enough. If however you need more advanced XML features like XPATH, XIincludes or XSL, or simply speed, look into lxml!

minidom - 包含在标准库中，在我看来是一个很大的优点。它为您提供了一种加载/编写XML文档的简单方法，并公开了上述DOM 1级规范。没有更多，没有更少。对于大多数小型/简单项目来说，这已经足够了。但是，如果您需要更高级的XML功能，如XPATH，XIincludes或XSL，或者只是速度，请查看lxml！

Hope this get's you started. Good Luck!

希望这是你的开始。祝你好运！

1  

Use lxml package in python, because lxml supports to xpath which is very helpful for firing query on xml file. And it is fast to process large data from XML file

在python中使用lxml包，因为lxml支持xpath，这对于在xml文件上触发查询非常有用。从XML文件处理大数据的速度很快

from lxml import etree
tree = etree.parse(XML_FILE_PATH)
root = self.tree.getroot()

To get text from node of xml :

从xml的节点获取文本：

nodes =  tree.findall("//item")
text = [node.text for node in nodes]

You will get list i.e [1,2,3,4] , after that you can sort result list using sorted(text)

您将获得列表，即[1,2,3,4]，之后您可以使用排序（文本）对结果列表进行排序

And for getting elements attributes, you can use -:

要获取元素属性，您可以使用 - ：

Suppose, 1

假设， 1

entries = tree.xpath("//item[@id='2']")

You will get all attributes i.e {'id':2, 'name':'abc'} in entries

您将在条目中获得所有属性，即{'id'：2，'name'：'abc'}