Python-list-of-lists Archives

Last Updated: 06 February 2025

A list of lists is a common data structure in Python, used for handling multi-dimensional data, matrix operations and hierarchical data processing. Python provides several...read more

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Python-list-of-lists

Indexing Lists Of Lists In Python

Last Updated: 02 January 2025

Lists of lists, also known as nested lists or sometimes 2D lists, are powerful structures in Python for managing multi-dimensional data such as matrices or tables. Direct ...read more

Iterate Over a List of Lists in Python

Last Updated: 22 April 2025

We are given a list that contains multiple sublists, and our task is to iterate over each of these sublists and access their elements. For example, if we have a list like ...read more

Sorting List of Lists with First Element of Each Sub-List in Python

Last Updated: 06 February 2024

In Python, sorting a list of lists by the first element of each sub-list is a common task. Whether you're dealing with data points, coordinates, or any other structured in...read more

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Python Tips and Tricks for Competitive Programming

Last Updated: 19 August 2021

Python Programming language makes everything easier and straightforward. Effective use of its built-in libraries can save a lot of time and help with faster submissions wh...read more

Competitive Programming

How to iterate through a nested List in Python?

Last Updated: 13 December 2024

A nested list is a list that contains other lists. Working with nested lists can seem tricky at first but it becomes easy once we understand how to iterate through them. T...read more

Python - Group similar elements into Matrix

Last Updated: 15 May 2023

Sometimes, while working with Python Matrix, we can have a problem in which we need to perform grouping of all the elements with are the same. This kind of problem can hav...read more

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Python - Convert 2D list to 3D at K slicing

Last Updated: 13 March 2023

Sometimes, while working with Python lists, we can have a problem in which we need to convert a 2D list to 3D, at every Kth list. This type of problem is peculiar, but can...read more

Python - Retain all K elements Rows

Last Updated: 10 April 2023

Sometimes, while working with Python lists, we can have a problem in which we need to retain rows which have only K as elements. This kind of application can occur in data...read more

Python - Custom Columns Matrix

Last Updated: 02 May 2023

Sometimes, while working with Python lists, we can have a problem in which we need to extract certain columns from Matrix and recreate it. This kind of problem can have ap...read more

Python - Nested List to single value Tuple

Last Updated: 05 December 2023

Sometimes, while working with Python data, we can have problems in which we need to convert Python Nested lists to single values tuples. This kind of problem can have appl...read more

Python - Convert List of Dictionaries to List of Lists

Last Updated: 21 January 2025

We are given list of dictionaries we need to convert it to list of lists. For example we are given a list of dictionaries a = [{'name': 'Geeks', 'age': 25}, {'name': 'Geek...read more

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Python-list-of-lists

Python - Nested Records List from Lists

Last Updated: 06 December 2023

Sometimes, while working with Python Data, we can have problems in which we have data incoming in different formats. In this, we can receive data as key and value in separ...read more

Python - Reverse Row sort in Lists of List

Last Updated: 22 February 2025

We are given a list of lists where each inner list represents a row and our task is to sort each row in descending order while keeping the overall structure intact. For ex...read more

Python - Group Sublists by another List

Last Updated: 20 February 2023

Sometimes, while working with lists, we can have a problem in which we need to group all the sublists, separated by elements present in different list. This type of custom...read more