Python List of List Programs Last Updated : 06 Feb, 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 Next Article Python List of List Programs H harshitwn5p Follow Improve Article Tags : Python Python Programs Python list-programs Python-list-of-lists Practice Tags : python Similar Reads Python List Creation Programs Python provides multiple ways to create lists based on different requirements, such as generating lists of numbers, creating nested lists, forming lists of tuples or dictionaries, and more.This article covers various ways to create lists efficiently, including:Generating lists of numbers, strings, a 2 min read Python List Removal Programs This article presents a collection of Python programs demonstrating different ways to remove elements from a list. Whether you need to remove duplicates, delete elements by value or index, or filter lists based on conditions, these examples will help you efficiently manipulate lists in Python.Ways t 5 min read Python List Add/Append Programs This article covers a wide range of methods for adding elements to a list, including:Basic addition techniques like append(), extend(), and insert().Appending multiple items, lists, tuples, dictionaries and objects.Performing list modifications such as adding at the beginning, middle or end.Advanced 3 min read Python Programs Practice with Python program examples is always a good choice to scale up your logical understanding and programming skills and this article will provide you with the best sets of Python code examples.The below Python section contains a wide collection of Python programming examples. These Python co 11 min read Output of Python Programs | Set 22 (Loops) Prerequisite: LoopsNote: Output of all these programs is tested on Python3 1. What is the output of the following?Python mylist = ['geeks', 'forgeeks'] for i in mylist: i.upper() print(mylist) [‘GEEKS’, ‘FORGEEKS’].[‘geeks’, ‘forgeeks’].[None, None].Unexpected Output: 2. [‘geeks’, ‘forgeeks’]Explana 2 min read Python List and Tuple Combination Programs Lists and tuples are two of the most commonly used data structures in Python. While lists are mutable and allow modifications, tuples are immutable and provide a stable structure for storing data. This article explores various programs related to list and tuple combinations, covering topics like:Sor 6 min read Output of Python program | Set 15 (Loops) Prerequisite - Loops in Python Predict the output of the following Python programs. 1) What is the output of the following program? Python x = ['ab', 'cd'] for i in x: i.upper() print(x) Output:['ab', 'cd']Explanation: The function upper() does not modify a string in place, but it returns a new stri 2 min read Output of Python programs | Set 8 Prerequisite - Lists in Python Predict the output of the following Python programs. Program 1 Python list = [1, 2, 3, None, (1, 2, 3, 4, 5), ['Geeks', 'for', 'Geeks']] print len(list) Output: 6Explanation: The beauty of python list datatype is that within a list, a programmer can nest another list, 3 min read Python Programs Combining Lists with Sets Lists maintain order and allow duplicate elements, while sets are unordered collections of unique elements. Combining these two structures enables efficient data processing, such as removing duplicates, checking subsets, converting between formats and performing set operations.This collection of Pyt 2 min read Output of Python programs | Set 7 Prerequisite - Strings in Python Predict the output of the following Python programs. These question set will make you conversant with String Concepts in Python programming language. Program 1Python var1 = 'Hello Geeks!' var2 = "GeeksforGeeks" print "var1[0]: ", var1[0] # statement 1 print "var2[1:5 3 min read Like