Set¶

Sets are one of the built-in data types in Python. It can be referred as a collection of items.

Sets can also be used efficiently to perform MATH operations like union, intersection and symmetric_intersection.

s = {"red", "blue", "green"}

Unlike Lists and Tuples, Sets are unordered and unindexed, which means you cannot be sure about the order of Set elements.

s = {"red", "blue", "green"}
print(s)

List vs Tuple vs Set¶

Tuple	List	Set
Tuple is Immutable	List is Mutable	Set can be added and deleted but not updated
Tuple is more appropriate for accessing data	List is more appropriate for performing insertion, updating and deletion	Set is mostly used to perform MATH Operations
Initialized using ()	Initialized using []	Initialized using {}

Execute the above program multiple times to notice that the order of set elements is not the same every time.

In Python, Sets does not allow you to store duplicates.

s = {"red", "blue", "green", "red"}
print(s)

Elements in a set cannot be modified. However, elements can be added and removed.