Mar 6, 2025 · Learn how to convert a list to a set in Python using the set() function. Remove duplicates and store unique elements for faster lookups and data manipulation.

my_set = set(my_list) or, in Python 3, my_set = {*my_list} to create a set from a list. Conversely, you can also do. my_list = list(my_set) or, in Python 3, my_list = [*my_set] to create a list from a set. Just note that the order of the elements in a list is generally lost when converting the list to a set since a set is inherently unordered.

To add the elements of a list to a set, use update. From https://docs.python.org/2/library/sets.html. E.g. If you instead want to add the entire list as a single element to the set, you can't because lists aren't hashable. You could instead add a tuple, e.g. s.add(tuple(l)).

Learn how to convert a list to a set in Python using set () and unpacking methods with examples. Handle duplicates and achieve unique elements.

Mar 21, 2012 · On CPython 3.6+ unique = list(dict.fromkeys([1, 2, 1]).keys()). This works because dict s preserve insertion order now. A set is an unordered data structure, so it does not preserve the insertion order. This depends on your requirements.

May 15, 2021 · There are many approaches to doing this. 1. Using set () Function. This approach is one of the simplest methods of converting a list into a set. All you need is to use the set () constructor and pass the list as an argument. Syntax: set(list). Created a list having few elements.

Sep 15, 2023 · The simplest and most straightforward method to convert a list to a set in Python is by using the set() function. The set() function takes an iterable, such as a list, as an argument and returns a set containing all the unique elements from the iterable.

Aug 26, 2024 · How to Convert a List to a Set: Python makes this conversion incredibly simple using the built-in set() constructor: my_set = set(my_list) print(my_set) # Output: {1, 2, 'apple', 'banana'} Step-by-step explanation: my_list: We start with a list containing some duplicate values.

May 30, 2024 · You can convert a list to a set in python using many ways, for example, by using the set(), for loop, set comprehension, and dict.fromkeys() functions. In this article, I will explain how to convert a list to a set in python by using all these methods with examples.

Nov 4, 2023 · Converting List to Set: You can easily convert a list into a set in Python by using the built-in function set(). It takes the list as an argument and returns a new set which contains only unique elements from the list.