Python set() Function

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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

  • set([iterable])

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:

  • {8, 2, 4, 6}

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