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Set Subtraction

You can use some of the "normal" mathematical operations on sets. For example, you can subtract one set from another. It removes all the values in the second set from the first set.

set1 = {"apple", "banana", "grape"}
set2 = {"apple", "banana"}
set3 = set1 - set2

print(set3)
# Prints: {'grape'}

Assignment

Complete the find_missing_ids function. It accepts two lists as input, and returns a new set of all the IDs that are in the first list but are not in the second.

Naturally, the result should not have any duplicate IDs.

Tips

Convert a List to a Set with set(): set(my_list).
You can subtract the elements in one Set from another Set using the - operator.