python join list of list of lists using key

In Python, you may need to join lists of lists of lists using a key, where you want to combine sublists based on a common element or attribute. This tutorial will guide you through the process of joining such lists of lists of lists using a key with code examples.
Make sure you have Python installed on your system. This tutorial assumes you have at least a basic understanding of Python and lists.
For this tutorial, we will create a sample dataset with a list of lists of lists. In this example, we will have a dataset of books, and each book will have details like title, author, and genre.
In the above example, books is a list of two lists, and each list contains sublists with book details. The first sublist is a header containing column names.
We will now create a function that takes the list of lists of lists and a key as input and returns a new list of lists of lists where the sublists are joined based on the key. In this case, the key is the author's name.
In this code, we created a join_lists_by_key function that takes the data and key as input. It iterates through the sublists, groups them by the key, and then combines them into a new list of lists of lists.
Now, let's display the result after joining the lists of lists of lists.
This code will print the joined sublists in the following format:
As you can see, the sublists are joined based on the author's name.
In this tutorial, you learned how to join lists of lists of lists using a key in Python. You can adapt this approach to your specific data and key to perform similar operations with nested data structures.
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