Python Set add() Method

Python add() method adds new element to the set. It takes a parameter, the element to add. It returns None to the caller. The method signature is given below.

Signature

Parameters

elem: element to be added.

Return

It returns None.

Let’s see some examples of add() method to understand it’s functionality.

Python Set add() Method Example 1

A simple example to add a new element in the set. It returns a modified set.

Output:

{1, 2, 3}  After adding new element:    {1, 2, 3, 4}  

Python Set add() Method Example 2

Adding an element which already exist will not modifiy the set. Set does not store duplicate elements. See the example below.

Output:

{1, 2, 3}  After adding new element:   {1, 2, 3}  

Python Set add() Method Example 3

Set also allows to store other datastructures like tuple, list etc. See the example below.

Output:

{1, 2, 3}  After adding new element:    {(4, 5), 1, 2, 3}  After adding tuple:    {1, 2, 3, (4, 5), (2, 3, 4)}