Python set() Function

In python, a set is a built-in class, and this function is a constructor of this class. It is used to create a new set using elements passed during the call. It takes iterable as an argument and returns a new set object. The constructor syntax is given below.

Signature

Parameters

iterable: a collection of immutable elements.

Return

It returns a new set.

Let's see some examples of set() function to understand it's functionality.

Python set() Function Example 1

A simple example to create a set of using iterable elements.

# Python set() function example
# Calling function
result = set() # empty set
result2 = set('12')
result3 = set('javatpoint')
# Displaying result
print(result)
print(result2)
print(result3)

Output:

set()
{'1', '2'}
{'a', 'n', 'v', 't', 'j', 'p', 'i', 'o'}

Python set() Function Example 2

# Python set() function example
# Calling function
result = set(['12','13','15'])
result2 = set(('j','a','v','a','t','p','o','i','n','t'))
result3 = set({1:'One',2:'Two',3:'Three'})
# Displaying result
print(result)
print(result2)
print(result3)

Output:

{'15', '13', '12'}
{'n', 'v', 'a', 'j', 'p', 't', 'o', 'i'}
{1, 2, 3}

Python set() Function Example 3

Here, we are creating a set of filtered elements. The geteven function returns even values.

# Python set() function example
def geteven(data):
    if data%2 == 0:
        return data
    
evenval = filter(geteven,[2,5,6,9,8,4])
# Calling function
result = set(evenval)
# Displaying result
print(result)

Output: