# Creating an empty set
my_set = set()

# Adding a single element
my_set.add(1)

# Adding multiple elements using update method
my_set.update([2, 3, 4])

# Adding multiple elements using union operator
my_set |= {5, 6, 7}

print(my_set)

Output:

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

An empty set my_set is created using set().

The add method is used to add a single element (1) to the set.

The update method is used to add multiple elements (2, 3, 4) to the set. You can pass an iterable (like a list) as an argument to update.

The union operator (|) is used to combine the set with another set containing elements 5, 6, and 7.

Now, my_set contains all the elements [1, 2, 3, 4, 5, 6, 7].

Remember that sets do not maintain order, so the elements may not be in the same order as they were added. Additionally, duplicate elements are automatically removed from sets.