Python has a set of built-in methods that you can use on sets.
Method Shortcut Description add() Adds an element to the set clear() Removes all the elements from the set copy() Returns a copy of the set difference()- Returns a set containing the difference between two or more sets difference_update() -= Removes the items in this set that are also included in another, specified set discard() Remove the specified item intersection() & Returns a set, that is the intersection of two other sets intersection_update() &= Removes the items in this set that are not present in other, specified set(s) isdisjoint() Returns whether two sets have a intersection or not issubset() <= Returns True if all items of this set is present in another set < Returns True if all items of this set is present in another, larger set issuperset() >= Returns True if all items of another set is present in this set > Returns True if all items of another, smaller set is present in this set pop() Removes an element from the set remove() Removes the specified element symmetric_difference() ^ Returns a set with the symmetric differences of two sets symmetric_difference_update() ^= Inserts the symmetric differences from this set and another union() | Return a set containing the union of sets update() |= Update the set with the union of this set and others
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