Скачать или смотреть How to Remove Whole Tags from XML Using ElementTree in Python

Learn how to effectively sanitize XML files by removing unwanted tags using Python's ElementTree library. This simple guide will walk you through the entire process with practical examples.
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This video is based on the question https://stackoverflow.com/q/62420995/ asked by the user 'jvbs' ( https://stackoverflow.com/u/6580518/ ) and on the answer https://stackoverflow.com/a/62424535/ provided by the user 'balderman' ( https://stackoverflow.com/u/415016/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction: Sanitizing XML Tags

When working with XML files, it's not uncommon to encounter situations where certain tags or attributes need to be removed for data sanitization. In this guide, we will address a specific case where we need to remove entire tags based on the value of an attribute. We will be using Python's xml.etree.ElementTree module to accomplish this.

Imagine you have an XML file structured as follows:

[[See Video to Reveal this Text or Code Snippet]]

Your goal is to remove the <EndEtnCli/> tag if the attribute EmaiCli is empty. Below, we will explore a step-by-step approach to write a script that handles this scenario effectively.

Understanding the Problem

Before diving into the solution, let's clarify the problem:

Context: You have XML data where some elements may contain empty attributes.

Task: Remove the corresponding tag if the attribute EmaiCli is empty or not present.

Example XML Structure

Here’s a sample XML we'll work with:

[[See Video to Reveal this Text or Code Snippet]]

Solution: Using ElementTree to Remove Tags

Here’s a revised script to achieve the desired outcome. We will go step-by-step for clarity.

Step 1: Import the Required Library

First, we need to import the necessary library from Python's standard library:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Define the XML Data

Instead of reading from a file initially, we will define our XML structure as a string for simplicity in testing:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Finding the Relevant Tags

We will navigate through the XML structure to locate the Cli elements and their associated EndEtnCli child elements:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Check the Attribute and Remove the Tag

Now it's time to check the EmaiCli attribute. If it's empty or missing, we will remove the entire EndEtnCli tag:

[[See Video to Reveal this Text or Code Snippet]]

Step 5: Output the Result

Finally, we'll display the modified XML structure to see the changes:

[[See Video to Reveal this Text or Code Snippet]]

Expected Output

After executing the above script, the output will look like this:

[[See Video to Reveal this Text or Code Snippet]]

Wrapping Up

In this guide, we explored how to remove whole tags from an XML document based on attribute conditions using Python’s ElementTree module. By clearly understanding both the XML structure and the desired changes, we crafted an effective solution step-by-step.

Feel free to modify this code snippet according to your XML input and adapt it for more complex requirements. Happy coding!