Here's a common mistake. What do you think this creates? python empty = {} print(type(empty)) # <class 'dict'> - NOT a set! Empty curly braces create an empty dictionary, not an empty set.
This is because dictionaries came first in Python and got the {} syntax. To create an empty set, use the constructor: python empty_set = set() print(type(empty_set)) # <class 'set'> Remember: {} is dict, set() is set.