How To Add To A Set In Python

Sets are a versatile and helpful data structure in Python, allowing you to store unique elements in an unordered fashion. In this tutorial, you will learn how to add elements to a set in Python.

Step 1: Create a Set

To begin, you’ll need to create a set. In Python, sets can be created by enclosing a comma-separated list of elements within curly braces {} or by using the set() function. An empty set must be created using the set() function, as {} would create an empty dictionary instead of a set. Here’s an example:

Now that you have a set, let’s move on to adding elements to it.

Step 2: Adding Elements

There are two primary methods to add elements to a set: add() and update(). By using these methods, you can add single elements, multiple elements, or even merge multiple sets together.

Adding Single Elements

To add a single element to a set, use the add() method. This will only add the element if it doesn’t already exist in the set. Here’s an example:

Output:

{1, 2, 3, 4}

Adding Multiple Elements

To add multiple elements to a set at once, use the update() method. The update() method takes an iterable (e.g., list, set, tuple) as its argument and adds each element from the iterable to the set. Here’s an example:

Output:

{1, 2, 3, 4, 5, 6, 7}

Adding Elements From Another Set

You can also merge one set with another using the update() method, like so:

Output:

{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

Full Code:

Output:

{1, 2, 3, 4}
{1, 2, 3, 4, 5, 6, 7}
{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

Conclusion

You have now learned how to add elements to a set in Python using the add() and update() methods. By implementing these methods in your code, you can efficiently perform operations on sets, ensuring that each element remains unique. Happy coding!