如何从字符串中提取子字符串？ [英] How do I extract substring from string?

问题描述

我在这里有一个xml字符串，我需要从中识别这些值并从中省略名称。我想的逻辑是提取

>之间的所有字符串。和< /。 
 
然后删除任何提取的子字符串，其中包含>，<或< /在其中

XML字符串是：

< ServiceInstanceUpdateAck xmlns ='http：//www.loremipsum.com/'> 
< Context> 
< Attribute name ='Atri1'> A1< / Attribute> 
< Attribute name ='Atri2'> A2< / Attribute> 
< Attribute name ='Atri3'> A3< / Attribute> 
< / Context> 
< Operation> DEPROVISION< / Operation> 
<状态>成功< /状态> 
<错误消息='无错误'majorErrorCode ='E_NONE'minorErrorCode ='E_NONE'/> 
< Service> 
< Id> 11233334< / Id> 
< / Service> 
< / ServiceInstanceUpdateAck> 

这将是什么python代码？我正在学习python而且还没有那么好的字符串。感谢任何帮助。

解决方案

您不应该以这种方式处理XML，使用适当的XML解析器，例如 20.6。 xml.dom - 文档对象模型API& mdash; Python 3.3.6文档 [ ^ ]。

I have an xml string here from which I need to identify the values and leave out names from it. The logic I thought is to extract all strings which are in between of

> and </.

Then remove any extracted substring which has  >,< or </ in it

XML string is:

<ServiceInstanceUpdateAck xmlns='http://www.loremipsum.com/'>
  <Context>
    <Attribute name='Atri1'>A1</Attribute>
    <Attribute name='Atri2'>A2</Attribute>
  <Attribute name='Atri3'>A3</Attribute>
  </Context>
  <Operation>DEPROVISION</Operation>
  <Status>SUCCESS</Status>
  <Error message='No Error' majorErrorCode='E_NONE' minorErrorCode='E_NONE'/> 
  <Service>
    <Id>11233334</Id>
  </Service> 
</ServiceInstanceUpdateAck>

What will be the python code for that? I am learning python and not that good with strings yet. Any help is appreciated.

解决方案

You should not treat XML in this way, use a proper XML parser such as 20.6. xml.dom — The Document Object Model API — Python 3.3.6 documentation[^].

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