Скачать или смотреть How to Convert a Python List into a List of Lists for Easy DataFrame Initialization

Discover the simple steps to transform a standard Python list into a `list of lists`, making it easy to initialize a Pandas DataFrame.
---
This video is based on the question https://stackoverflow.com/q/70292648/ asked by the user 'Kerbol' ( https://stackoverflow.com/u/1782980/ ) and on the answer https://stackoverflow.com/a/70292780/ provided by the user 'Dario Cotza' ( https://stackoverflow.com/u/12388608/ ) 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: Convert Python List into a "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 a Python List into a List of Lists

When working with data in Python, especially in data analysis contexts such as using Pandas, you might encounter situations where you need to convert a list of strings into a more structured format called a "list of lists." This structure delivers a cleaner format that allows for intuitive handling and manipulation of data.

In this guide, we will delve into a specific example where we transform a list formatted with strings representing lists into an actual list of lists.

The Problem

Let's say you have the following list of strings:

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

Here, each string represents a list but is currently wrapped in single quotes and square brackets. Your goal is to convert this into a list of lists that looks like this:

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

This transformation will help in initializing a Pandas DataFrame efficiently.

Breakdown of the Solution

To achieve the transformation, follow these steps:

Step 1: Prepare Your List

Start by defining your initial list of strings:

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

Step 2: Remove Square Brackets and Split the Strings

You will need to manipulate each string in the list to remove the outer square brackets and to split the content into individual items. Use a list comprehension to loop through each element:

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

Step 3: Output the Result

Now that you have processed the strings, you can print the result. It should display the desired list of lists structure:

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

Full Code Example

Putting it all together, here’s the complete code snippet:

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

Conclusion

Transforming a Python list of strings into a list of lists may seem intricate at first, but with a few simple string manipulations, you can achieve the desired format suited for initializing a Pandas DataFrame effectively.

Remember that working with data often requires careful formatting, so embracing these techniques can enhance your productivity and the quality of your data analyses.

Happy coding!