Python built-in Method - set()

The set() function is a built-in Python method that is used to create a set data type. A set is an unordered collection of unique elements. The set() function can be used to convert other data types, such as lists, tuples, and strings, into a set.

The syntax for the set() function is as follows:

set(iterable)

• iterable: The iterable object to be converted into a set.

Here are some examples of how the set() function can be used:

>>> s = set()
>>> s.add(1)
>>> s.add(2)
>>> s.add(3)
>>> print(s)
{1, 2, 3}

In this example, we create an empty set s using the set() function. We then add the elements 1, 2, and 3 to the set using the add() method. Finally, we print the set.

>>> lst = [1, 2, 3, 3, 2, 1]
>>> s = set(lst)
>>> print(s)
{1, 2, 3}

In this example, we create a list lst with duplicate elements. We then use the set() function to convert the list into a set. The set contains only the unique elements from the list.

>>> s1 = set("hello")
>>> s2 = set("world")
>>> print(s1.union(s2))
{'l', 'h', 'o', 'w', 'e', 'd', 'r'}

In this example, we create two sets s1 and s2 from two different strings. We then use the union() method to combine the two sets into a single set containing all the unique elements from both sets.

The set() function is a useful built-in method in Python that provides a convenient way to create a set data type from other iterable objects. The set data type is useful for performing set operations, such as union, intersection, and difference, and for removing duplicate elements from a collection.