set union

• set
• union

english = set(['door', 'car', 'lunar', 'era'])
spanish = set(['era', 'lunar', 'hola'])

all_the_words = english.union(spanish)

print(english)
print(spanish)
print(all_the_words)

# x = english + spanish # TypeError: unsupported operand type(s) for +: 'set' and 'set'

Output:

{'era', 'door', 'lunar', 'car'}
{'era', 'hola', 'lunar'}
{'era', 'door', 'car', 'hola', 'lunar'}