what is a built in set class python code example

Example 1: set except python

# Program to perform different set operations 
# as we do in  mathematics 
  
# sets are define 
A = {0, 2, 4, 6, 8}; 
B = {1, 2, 3, 4, 5}; 
  
# union 
print("Union :", A | B) 
  
# intersection 
print("Intersection :", A & B) 
  
# difference 
print("Difference :", A - B) 
  
# symmetric difference 
print("Symmetric difference :", A ^ B)

Example 2: python set

# A set contains unique elements of which the order is not important
s = set()
s.add(1)
s.add(2)
s.remove(1)
print(s)
# Can also be created from a list (or some other data structures)
num_list = [1,2,3]
set_from_list = set(num_list)