set subset

---

examples/sets/subset.py

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

words = set(['door', 'lunar'])


print('issubset: ', words.issubset( english ))
print('issubset: ', words.issubset( spanish ))

issubset:  True
issubset:  False