union() method to get all elements of the sets by using

All set methods

Returns a set with all elements after removing duplicates

union using | operator

All Common elements in sets
Using vertical bar ( | ) operator

A={1,2,3}
B={3,4,5}
print(A|B)

Output ( Note 3 is used once only )

{1, 2, 3, 4, 5}

Using union() method

A={'a','b','c'}
B={'a','y','z'}
print(A.union(B))

Output

{'z', 'c', 'a', 'y', 'b'}

We can use any number of sets with union()

A={'a','b','c'}
B={'a','y','z'}
C={'a','k','l'}
print(A | B |C)

Output

{'z', 'l', 'k', 'c', 'a', 'y', 'b'}

Using string ( iterable object ) with union() method

A={'a','b','c','x','y'}
B='Alex'
print(A.union(B))

Output

{'l', 'e', 'A', 'a', 'c', 'x', 'y', 'b'}

Note : we can't use iterable object by using vertical bar ( | ) the union operator

Using list with union() method.

A={'a','b','c'}
B=['a','x','y']
print(A.union(B))

Output

{'c', 'x', 'y', 'a', 'b'}

Below code will generate error.

print(A | B)

 TypeError: unsupported operand type(s) for |: 'set' and 'list'