CODE EXAMPLE FOR PYTHON

Python frozenset()

Frozen set is just an immutable version of a Python set object. While elements of a set
can be modified at any time,elements of the frozen set remain the same after creation.
frozenset([iterable])
# tuple of vowels
vowels = ('a', 'e', 'i', 'o', 'u')

fSet = frozenset(vowels)
print('The frozen set is:', fSet)  #The frozen set is: frozenset({'a', 'o', 'u', 'i', 'e'})

print('The empty frozen set is:', frozenset())   #The empty frozen set is: frozenset()

# frozensets are immutable
fSet.add('v')