Скачать или смотреть Transforming Nested Lists in Python: Change All Elements to 1

Learn how to effectively change all elements in lists of lists in Python using a custom recursive function.
---
This video is based on the question https://stackoverflow.com/q/65054409/ asked by the user 'zivanska_' ( https://stackoverflow.com/u/14726567/ ) and on the answer https://stackoverflow.com/a/65054459/ provided by the user 'quamrana' ( https://stackoverflow.com/u/4834/ ) 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 all elments 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.
---
Transforming Nested Lists in Python: Change All Elements to 1

If you're diving into the world of Python programming, you may have encountered situations where you need to manipulate complex data structures like lists of lists. One common challenge is transforming every element in a nested list. In this guide, we'll explore how to effortlessly convert all elements in nested lists to 1, using a simple yet effective recursive function.

Understanding the Problem

Consider a situation where you have a list containing multiple sublists, each filled with integers (like zeros and ones). Your goal is to overwrite all these integers, regardless of how deeply nested they are, with the number 1. For example, given the following nested list:

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

You'll want to transform it into:

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

Implementing the Solution

To solve this, we can write a recursive function that traverses each element in the nested list. The function will check the type of each element and replace integers with 1, while also handling any lists it encounters by calling itself recursively.

Step-by-Step Breakdown

Define the recursive function: Create a function vnor(tab) that takes the nested list as an argument.

Iterate through the elements: Use a for loop to iterate over each element in the passed list.

Check the type of each element:

If it's an int, update it to 1.

If it's a list, call vnor() on that sublist.

Return the modified list: Finally, make sure to return the transformed list.

Sample Code

Here’s how the complete code looks:

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

Conclusion

In this post, we tackled the need to change all elements in lists of lists in Python, effectively transforming them into a uniform value. By utilizing a recursive approach, we ensured that even nested lists were thoroughly processed. This method showcases the power of recursion in Python, making complex tasks manageable and efficient.

Whether you're handling data for a project or just experimenting with Python, this technique is not just useful but also applicable in various programming scenarios. Happy coding!