define multidimensional list in python

stackoverflow.com › questions › 17636567 › how-to-create-a-multi-dimensional-list

You can do it quite efficiently with a list comprehension:

a = [[0] * number_cols for i in range(number_rows)]

Answer from cheeyos on Stack Overflow

GeeksforGeeks

geeksforgeeks.org › python › multi-dimensional-lists-in-python

Multi-dimensional Lists in Python - GeeksforGeeks

October 30, 2025 - In Python, a Multi-dimensional List is a list containing other lists, often used to represent structured data like matrices, tables or 2D arrays. It’s useful for storing and accessing data in rows and columns, commonly applied in data analysis, ...

TutorialsPoint

tutorialspoint.com › multi-dimensional-lists-in-python

Multi-dimensional lists in Python

July 10, 2020 - In the below program we create a multidimensional list of 4 columns and 3 rows using nested for loops ? multlist = [[0 for columns in range(4)] for rows in range(3)] print(multlist) ... # Mixed data types in multidimensional list mixed_list = [["Mon", "Tue", "Wed"], [2, 4, 9], [1, 1.5, 2]] print(mixed_list)

Discussions

Python 2.7 creating a multidimensional list - Stack Overflow

In Python I want an intuitive way to create a 3 dimensional list. More on stackoverflow.com

stackoverflow.com

Multidimensional Lists - creating, reading and updating

I understand in python this isn’t possible Not only possible, this is actually valid python syntax. object = [[] for i in range(256)] object[0] = [1,2,3,4,5,6] print(object) The first line uses list comprehension to create 256 empty lists and use them as items in object. More on reddit.com

r/learnpython

1

March 7, 2022

Python Multidimensional List / Array - Stack Overflow

I am confused with Python arrays, I am used to using PHP and am trying to achieve what I think should be a multi-dimensional array but using Pythons lists. I have the following HTML... More on stackoverflow.com

stackoverflow.com

Multidimensional lists creation, why the weird behavior

https://stackoverflow.com/questions/240178/list-of-lists-changes-reflected-across-sublists-unexpectedly

Top answer

1 of 8

28

You can do it quite efficiently with a list comprehension:

a = [[0] * number_cols for i in range(number_rows)]

2 of 8

15

This is a job for...the nested list comprehension!

[[0 for i in range(10)] for j in range(10)]

python - Creating a multidimensional list in python3 and assign values in a loop

Multi dimensional list Python (beginner)

arrays - How to generate multi dimensional list in python

Python Two-Dimensional List Processing

How can I define multidimensional arrays in python?

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Python Programming

pythonprogramming.net › python-3-multi-dimensional-list

Multi-dimensional lists Python Tutorial

In this Python 3 tutorial, we cover the concept of multi-dimensional lists. Multi dimensional lists are lists within lists, or lists within lists within lists... you get the point. It can get very confusing very fast, but it is good to know that it is an option.

Ubaldo Acosta Soto

ictdemy.com › python › basics › multidimensional-lists-in-python

Lesson 10 - Multidimensional lists in Python - ICTdemy.com

(The list in this code is rotated since we define columns which are declared as rows here). In some cases, we don't even have to "waste" memory for the entire table. Instead, we're able to create jagged multidimensional lists. We can create it either using loops or use a shortened initialization (the code below creates the jagged list from the picture): jagged_list = [ [15, 2, 8, 5, 3], [3, 3, 7], [9, 1, 16, 13], [], [5] ] ... {PYTHON} jagged_list = [ [15, 2, 8, 5, 3], [3, 3, 7], [9, 1, 16, 13], [], [5] ] for column in jagged_list: for item in column: print(item, end = " ") print()

LinuxConfig

linuxconfig.org › home › python multidimensional lists

Multidimensional Lists in Python Explained

February 24, 2017 - It’s just as easy to access any of the other elements of either to top level lists or the numbers within. Multidimensional lists behave just like regular, single dimensional, lists.

IncludeHelp

includehelp.com › python › python-multidimension-lists.aspx

Python - Multidimensional Lists

February 17, 2024 - A multidimensional list refers to a Python list having more than one dimension. Python allows the creation of multidimensional lists by using lists inside a list.

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Stack Overflow

stackoverflow.com › questions › 13447882 › python-2-7-creating-a-multidimensional-list

Python 2.7 creating a multidimensional list - Stack Overflow

Top answer

1 of 13

22

I think your list comprehension versions were very close to working. You don't need to do any list multiplication (which doesn't work with empty lists anyway). Here's a working version:

>>> y = [[[] for i in range(n)] for i in range(n)]
>>> print y
[[[], [], [], []], [[], [], [], []], [[], [], [], []], [[], [], [], []]]

2 of 13

6

looks like the most easiest way is as follows:

def create_empty_array_of_shape(shape):
    if shape: return [create_empty_array_of_shape(shape[1:]) for i in xrange(shape[0])]

it's work for me

TutorialsPoint

tutorialspoint.com › article › how-do-i-create-a-multidimensional-list-in-python

How do I create a multidimensional list in Python?

September 16, 2022 - Multidimensional lists are created by nesting lists within lists. Use list[row][col] to access elements and append() to add new rows.

reddit.com › r/learnpython › multidimensional lists - creating, reading and updating

r/learnpython on Reddit: Multidimensional Lists - creating, reading and updating

March 7, 2022 -

New to python but not other higher level languages.

I’m having difficulty understanding how to use multidimensional lists in python.

I have a list if 256 objects. Each object has 6 variables. In other languages, I could read and update/change similar to

object[0] = [1,2,3,4,5,6]

…

object[255] = [1,2,3,4,5,6] Etc.

I understand in python this isn’t possible, so I’ll have to revert to something similar to

object = [[0], [1,2,3,4,5,6]]

…

object = [[255], [1,2,3,4,5,6]]

And reading will be similar to

var1 = object[0][3]

print(var1)

But I can’t get my head around it or find easy to,understand examples.

Does anyone have any quick and easy to digest resources that could help me understand this a bit better?

Thanks!

Top answer

1 of 1

3

I understand in python this isn’t possible Not only possible, this is actually valid python syntax. object = [[] for i in range(256)] object[0] = [1,2,3,4,5,6] print(object) The first line uses list comprehension to create 256 empty lists and use them as items in object.

Plus2Net

plus2net.com › python › list-2d.php

Python two or multi dimensional List: Declaring adding deleting rows columns and elements

for x in my_list: x.pop(3) print(my_list) Creating a two dimensional List by using random numbers

CodeSignal

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A Beginner's Guide to Multidimensional Arrays in Python

To construct a multidimensional or nested array in Python, we use lists inside lists.

LabEx

labex.io › tutorials › python-how-to-create-multidimensional-lists-438320

How to create multidimensional lists | LabEx

This tutorial will guide you through ... In Python, a multidimensional list is a list that contains other lists as its elements, creating a nested structure similar to a matrix or a grid....

DEV Community

dev.to › aatmaj › learning-python-basic-course-day-11-multidimensional-lists-and-tuples-3bfl

Learning Python-Basic course: Day 11, Multidimensional lists and Tuples - DEV Community

July 7, 2021 - >>> list=[[1,2,3],[2,3,4],[3,4,5]] >>> print(list[1]) [2, 3, 4] >>> print(len(list)) 3 >>> print(list[2][1]) 4 >>> print(len(list[0])) 3 >>> print(list) [[1, 2, 3], [2, 3, 4], [3, 4, 5]] >>> for i in range(0,len(list)): ... for j in range(0,len(list[i])): ... print(list[i][j]) ... 1 2 3 2 3 4 3 4 5 >>> for i in list: ... for c in i: ... print(c,end="") ... print() ... 123 234 345 · The last statement is the mysterious way python implements it's syntax. Rather than writing in range, we can easily take this shortcut. We can create multidimensional lists dynamically.

Processing

py.processing.org › tutorials › 2dlists

Two-Dimensional Lists \ Tutorials

Python Mode for Processing extends the Processing Development Environment with the Python programming language.

EDUCBA

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Multidimensional Array in Python | Creating a Multidimensional List

April 17, 2023 - Multidimensional Array concept can be explained as a technique of defining and storing the data on a format with more than two dimensions (2D). In Python, Multidimensional Array can be implemented by fitting in a list function inside another ...

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Snakify

snakify.org › two-dimensional lists (arrays)

Two-dimensional lists (arrays) - Learn Python 3 - Snakify

But the easiest way is to use generator, creating a list of n elements, each of which is a list of m zeros: ... In this case each element is created independently from the others.

linkedin.com › learning › programming-foundations-data-structures-22859292 › multidimensional-lists

Multidimensional lists - Python Video Tutorial | LinkedIn Learning, formerly Lynda.com

September 19, 2023 - - In some cases, a regular list is not enough to store certain structures of data. For example, consider a seating chart in a classroom. You'll want to keep track of which student is in each row and column location within your class. To do that in Python, you can use a multi-dimensional list.

Stack Overflow

stackoverflow.com › questions › 35538572 › python-multidimensional-list-array

Python Multidimensional List / Array - Stack Overflow

Top answer

1 of 1

2

That code actually creates a list of dict-ionaries, one for each link.

If you want to change the dictionaries to a list or a tuple (a list of constant size), you could change your code slightly:

list_of_lists = [ [category.get_attribute("href"), category.text]
                   for category in categories]
list_of_tuples = [ (category.get_attribute("href"), category.text)
                   for category in categories]

You would be indexing using [0] and [1] in both cases (instead of ['link'] and ['text']).

Sling Academy

slingacademy.com › article › python-define-generic-types-for-multidimensional-list

Python: Define Generic Types for Multidimensional List - Sling Academy

By utilizing the typing module, developers can create concise and expressive code that accurately represents the structure of multidimensional data. Through examples and explanations, this article has demonstrated how to utilize generic types such as List and Tuple to construct nested lists with specified element types. Additionally, it has explored advanced techniques including type aliases and recursive generic types to further enhance code readability and maintainability. By embracing these concepts, Python developers can efficiently manage complex data structures while ensuring robust type checking and improved code documentation.