Скачать или смотреть Changing a Specific Position in Lists of Lists in Python

Learn how to change a specific position in all lists contained within a list of lists in Python, with a focus on practical solutions and examples.
---
This video is based on the question https://stackoverflow.com/q/67248225/ asked by the user 'Alex' ( https://stackoverflow.com/u/10963057/ ) and on the answer https://stackoverflow.com/a/67248326/ provided by the user 'Nikolay Shindarov' ( https://stackoverflow.com/u/4764353/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: change specific positon in lists of lists

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Changing a Specific Position in Lists of Lists in Python: A Simple Guide

When working with nested lists in Python, you may encounter situations where you need to change a specific position in all lists. A common example is modifying all nested lists to substitute a particular color with a new one. This guide will explore how to efficiently make such modifications using Python, helping you enhance your skills in list manipulation.

The Problem

Imagine you have a list of lists, where each inner list contains string values representing colors. You want to change the color at a specific position in all these inner lists. For example, consider the following list of lists:

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

In this scenario, you want to change the color at the third position (index 2) from "red" to "lightgrey". After applying the change, your list should look like this:

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

The Solution

Using a Function to Modify the Lists

The best way to handle this scenario is to define a Python function that takes the list of lists, the new color, and the position to change as parameters. Let's break down how to create this function step-by-step.

Step 1: Define the Function

You will want a function that iterates through each list within the main list and updates the color at the specified position:

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

Step 2: Call the Function

You can now call this function using your original list of colors. For instance:

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

Step 3: Check the Result

After executing the above code, you can print your list_of_colors to see the changes made:

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

The Output

The expected output should be:

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

Summary

By using a simple function, you've effectively changed a specific position in all inner lists within a list of lists. This approach is flexible and can be adjusted based on the number of lists you have or the position you want to change. Whether you are manipulating colors for a plotly table or any other nested list, this technique can significantly enhance your data manipulation skills in Python.

Feel free to try this out in your own projects, and happy coding!