Python collections: sets

numericSet = {1, 13, 34}

Add

Add elements to the list (mutate)

numericSet.add(100)
# {1, 13, 34, 100}

Add multiple (update accepts iterables)

list.update([100, 200])
list.update({100, 200})
# {1, 13, 34, 100, 200}

Create a new set with new elements

{*numericSet, 100, 200}
# {1, 13, 34, 100, 200}

Check if exists

if 34 in numericSet:
    # whatever

Remove

numericSet.remove(34)
# {1, 13}
# Raises KeyError if the value does not exist in the set

numericSet.discard(34)
# {1, 13}
# Does not raise exceptions

popped = list.pop()
# Pops random argument (unordered set)