Python3 Sets DS
Python Data Structures: Sets Sets : -> A set is an unordered collection of items. Each element is unique (no duplicates). -> The set itself is mutable .We can add or remove items from it. -> Sets can be used to perform mathematical set operations like union ,intersection ,symmetric ,difference etc. Set Creation : Eg: #set of integers s={1,2,3} print(s) print(type(s)) output: set([1,2,3]) < type 'set' > #set does not allow duplicates. They store only one instance. s={1,2,3,1,2} print(s) output: {1,2,3} Eg: #we can make set from a list s=set([1,2,3,1]) print(s) output: {1,2,3} Eg: #initialize a set with set( ) method s=set( ) print(type(s)) output: < class 'set' > Add element to a Set : Eg: #we can add single element using add( ) method and #add multiple elements using update( ) method s={1,2,3}