set()

The built-in set() function returns a new set based on an optional iterable object such as a list

set(iterable)

The iterable parameter is optional. If nothing is passed, an empty set is created.

my_set = set()

print(my_set)
print(type(my_set))

my_set = set(["A", "B", "C"])
print(my_set)

The following output will look like this:

set()
<class 'set'>
{'C', 'B', 'A'}

In the example below, the seven root notes of a musical scale are represented in a set:

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