There's a huge difference.
- Sets can't contain duplicates
- Sets are unordered
- In order to find an element in a set, a hash lookup is used (which is why sets are unordered). This makes
__contains__(inoperator) a lot more efficient for sets than lists. - Sets can only contain hashable items (see #3). If you try:
set(([1],[2]))you'll get aTypeError.
In practical applications, lists are very nice to sort and have order while sets are nice to use when you don't want duplicates and don't care about order.
Also note that if you don't care about order, etc, you can use
new_set = myset.intersection(mylist)
to get the intersection between a set and a list.
Top answer 1 of 7
93
There's a huge difference.
- Sets can't contain duplicates
- Sets are unordered
- In order to find an element in a set, a hash lookup is used (which is why sets are unordered). This makes
__contains__(inoperator) a lot more efficient for sets than lists. - Sets can only contain hashable items (see #3). If you try:
set(([1],[2]))you'll get aTypeError.
In practical applications, lists are very nice to sort and have order while sets are nice to use when you don't want duplicates and don't care about order.
Also note that if you don't care about order, etc, you can use
new_set = myset.intersection(mylist)
to get the intersection between a set and a list.
2 of 7
14
sets — Unordered collections of unique elements
lists - ordered collections of elements
sets allows you to do operations such as intersection, union, difference, and symmetric difference, i.e operations of math's set theory. Sets doesn't allow indexing and are implemented on hash tables.
lists are really variable-length arrays, not Lisp-style linked lists. In lists the elements are accessed by indices.
GeeksforGeeks
geeksforgeeks.org › python › sets-vs-lists-python
Sets vs. Lists - Python - GeeksforGeeks
July 23, 2025 - The main difference is that lists are ordered, meaning the order of elements is preserved and they can be accessed by their index while sets are unordered meaning they do not maintain the order of elements and automatically ensure all elements are unique. This article will explore the differences between ...
When to use Lists, Sets, Tuples in Python? 🐍 - YouTube
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Difference between list, tuple, set, and dictionary in python - ...
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Difference Between List, Tuple, Set and Dictionary in Python - YouTube
freeCodeCamp
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Python Set VS List – Sets and Lists in Python
January 5, 2023 - Sets and lists are built-in data structures you can use to store and arrange values in Python. If you're wondering which to use, it depends on the use case. If you don’t want the values in the data to change, you can use a set. But if you want the items to change, you can use a list. You can also take into account whether the order of the items matters to you or not. That's why this article took you through what set and list are, how to create them, and most importantly the differences between the two of them.
DataCamp
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Python Sets Tutorial: Set Operations & Sets vs Lists | DataCamp
December 13, 2022 - Lists and tuples are standard Python data types that store values in a sequence. Sets are another standard Python data type that also store values. The major difference is that sets, unlike lists or tuples, cannot have multiple occurrences of the same element and store unordered values.
PythonForBeginners.com
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List vs Set in Python - PythonForBeginners.com
May 15, 2023 - You can add and delete elements from a set as well as a list. However, you cannot add mutable objects like lists, sets, dictionaries, etc to a set. Sets can only contain immutable elements. We can use the in operator to check if an element is present in a set as well as a list. There is no difference between using the in operator with a list or set.
GeeksforGeeks
geeksforgeeks.org › python › difference-between-list-vs-set-vs-tuple-in-python
Difference between List VS Set VS Tuple in Python - GeeksforGeeks
July 15, 2025 - ... # Creating a List a = [1, 2, ... # Removing an element a.remove(3) # List slicing print(a[1:3]) ... A Set is an unordered collection of unique elements....
Plain English
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Lists vs Sets in Python: A Comprehensive Guide | by Ayman Hamed | Python in Plain English
October 2, 2023 - This article aims to demystify these differences and provide clear guidance on when to use Lists and when to use Sets in Python. ... A List in Python is an ordered collection of items that allows duplicate entries. It is mutable, meaning you can modify its content.
Medium
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Python set vs list: What’s the Difference and When to Use Each | by Gary Bao | Medium
June 20, 2025 - ... fruits = ['apple', 'banana', 'apple', 'orange'] print(fruits) # Output: ['apple', 'banana', 'apple', 'orange'] ... A set is an unordered collection that automatically removes duplicates and only keeps unique items.
Towards Data Science
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Python Lists vs Sets | Towards Data Science
December 19, 2020 - Apart from that though, they are almost completely different. Sets only allow you to store unique values. In other words, a set cannot store duplicates of the same value and it will simply remove any duplicates:
Javatpoint
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Set vs List in Python
Difference between Set and List in Python with python, tutorial, tkinter, button, overview, entry, checkbutton, canvas, frame, environment set-up, first python program, operators, etc.
Quora
quora.com › What-are-the-differences-between-lists-and-sets-in-Python-and-when-do-I-use-one-over-the-other
What are the differences between lists and sets in Python and when do I use one over the other? - Quora
Answer (1 of 2): Lists and sets are very different from each other. * Lists can contain any data item you want, including other lists or dictionaries: sets can only contain immutable data (integers, floats, strings, tuples) - if you can use it as a key in a dictionary yoh can store it in a set....
GitConnected
levelup.gitconnected.com › list-vs-set-in-python-4ea183dfe20c
List vs. Set in Python. What are the differences between lists… | by Roi Yehoshua, PhD | Level Up Coding
August 3, 2023 - Although the article focuses on Python, the discussion here is relevant to any programming language that provides similar data structures (e.g., using ArrayList vs. HashSet in Java, or Array vs. Set in JavaScript). Let’s start with the things that are common to lists and sets: Both lists and sets can store a collection of objects of different types. Both lists and sets support adding an object, deleting an object and searching for an object in the collection.
Edureka Community
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What is the difference between sets and lists in Python | Edureka Community
February 8, 2022 - What is the difference between sets and lists in... Why is the object value not updating in MongoDB? Nov 26, 2024 · DFS PUT Command gives error on Windows Jul 22, 2024 · what kind of a nosql store is azure table storage Dec 15, 2023 ... Already have an account? Sign in. × ... Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP · "PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc.
LinkedIn
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Python List vs Set
April 3, 2023 - Lists can contain any type of object, including other lists or sets. Here's an example of a Python list: ... One of the primary advantages of lists is their flexibility. Because they are mutable, you can change the order of elements or add and remove items at will.
Quora
quora.com › What-is-the-key-difference-between-a-set-and-a-list-in-Python
What is the key difference between a set and a list in Python? - Quora
Answer (1 of 2): Sets and Lists are both standard datatypes in python that are used to store values in a sequence. 1. The major and most important difference between sets and list is that unlike lists, Sets cannot store multiple occurrences of the same elements. All elements are unique in a set....
Towards Data Science
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15 Examples to Master Python Lists vs Sets vs Tuples | Towards Data Science
December 1, 2020 - The count function can be used to count the number of occurrences of a specific element. It is only used with lists and tuples. Since sets do not contain any duplicate items, the count is 1 for all items. ... We have covered the differences and similarities between 3 essential data structures in Python.
YouTube
youtube.com › watch
Python Lists vs Tuples vs Sets - Visually Explained - YouTube
🔵 Resources & Further Learning- 📒 Practice notebook → https://colab.research.google.com/drive/1WkXQ7hEd74Dj-suqkFvn4guygwADv2Xy- 📒 Practice notebook solut...
Published: August 12, 2025
LearnPython.com
learnpython.com › blog › python-lists-tuples-sets
Python Lists, Tuples, and Sets: What’s the Difference? | LearnPython.com
A Python set is a built-in data structure in Python that, like lists and tuples, holds multiple elements. To understand how it’s different from lists and tuples, let’s go through another example.
Scaler
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Difference between list, tuple, set dictionary in Python
April 2, 2024 - The difference between list, tuple, set, and dictionary in Python lies in how they store data, allow modifications, maintain order, and handle duplicates. Lists and tuples store ordered data, meaning they maintain the sequence in which elements are added, and both allow duplicate elements.
Jerry Ng
jerrynsh.com › tuples-vs-lists-vs-sets-in-python
Tuples vs. Lists vs. Sets in Python - Jerry Ng
August 9, 2021 - When you describe an object as mutable, it’s simply a fancy way of saying the object's internal state can be changed. The key difference here is that Tuple is immutable (not changeable), whereas List and Set are mutable.