Python List of List Programs Last Updated : 23 Jul, 2025 Comments Improve Suggest changes Like Article Like Report 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 ways to manipulate and transform lists of lists, including sorting, merging, filtering and converting them into different formats.This collection of Python programs focuses on various techniques for working with lists of lists, such as flattening, sorting, counting elements, merging duplicates, and performing mathematical operations on nested lists. Whether you're dealing with structured data, matrix computations, or hierarchical lists, these programs will help you apply different list-handling techniques efficiently.Below is a list of useful programs demonstrating how to work with lists of lists in Python. Let’s dive in!Flatten a List of Lists in PythonSort list of list by specified indexInitialize List of ListsSort List of Lists Ascending and then DescendingWays to sum list of lists and return sum listConvert list of string to list of listConvert list of tuples to list of listMaximum sum of elements of list in a list of listsMerging duplicates to list of listSort list of lists by the size of sublistsSort list of lists by lexicographic value and then lengthWays to iterate tuple list of listsList of ListsConvert List of Lists to DictionaryConvert List of lists to list of SetsCreate A List of Lists Using For LoopCheck if element exists in list of listsCheck if a list exists in given list of listsSorting list of lists with similar list elementsConvert list into list of listsConcatenate two list of lists Row-wiseRemove given element from list of listsConvert List of lists to list of StringsConvert List of Lists to Tuple of TuplesChecking triangular inequality on list of listsCount number of lists in a list of listsSelect Random value from list of listsFind common elements in list of listsColumn deletion from list of listsSort Flatten list of listMaximum absolute difference list of listFind minimum of each index in list of listsColumn Product in List of listsMerge List with common elements in a List of ListsMerge two list of lists according to first elementFind frequency of given character at every position in list of listsConvert a list into a list of lists using a step valueGet positive elements from given list of listsCustom Multiplication in list of listsConvert column to separate elements in list of listsFilter rows with only Alphabets from List of ListsProduct of kth column in List of Lists Comment More infoAdvertise with us H harshitwn5p Follow Improve Article Tags : Python Python Programs Python list-programs Python-list-of-lists Explore Python FundamentalsPython Introduction 3 min read Input and Output in Python 4 min read Python Variables 5 min read Python Operators 5 min read Python Keywords 2 min read Python Data Types 8 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 7 min read Python Functions 5 min read Recursion in Python 6 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 5 min read Python Tuples 4 min read Dictionaries in Python 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 6 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 2 min read Python MySQL 9 min read Python Packages 12 min read Python Modules 7 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 6 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 15+ min read StatsModel Library- Tutorial 4 min read Learning Model Building in Scikit-learn 8 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 7 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 7 min read Python | Build a REST API using Flask 3 min read How to Create a basic API using Django Rest Framework ? 4 min read Python PracticePython Quiz 3 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like