All set methods are called on a given set. For example, if you created a set s = {1, 2, 3}, you’d call s.clear() to remove all elements of the set. We use the term “this set” to refer to the set on which the method is executed.
add() | Add an element to this set |
clear() | Remove all elements from this set |
copy() | Create and return a flat copy of this set |
difference() | Create and return a new set containing all elements of this set except the ones in the given set arguments. The resulting set has at most as many elements as this set. |
difference_update() | Remove all elements from this set that are members of any of the given set arguments. |
discard() | Remove an element from this set if it is a member, otherwise do nothing. |
intersection() | Create and return a new set that contains all elements that are members of all sets — this and the set argument(s) as well. |
intersection_update() | Removes all elements from this set that are not members in all other specified sets. |
isdisjoint() | Return True if no element from this set is a member of any other specified set. Sets are disjoint if and only if their intersection is the empty set. |
issubset() | Return True if all elements of this set are members of the specified set argument. |
issuperset() | Return True if all elements of the specified set argument are members of this set. |
pop() | Remove and return a random element from this set. If the set is empty, it’ll raise a KeyError. |
remove() | Remove and return a specific element from this set as defined in the argument. If the set doesn’t contain the element, it’ll raise a KeyError. |
symmetric_difference() | Return a new set with elements in either this set or the specified set argument, but not elements that are members of both. |
symmetric_difference_update() | Replace this set with the symmetric difference, i.e., elements in either this set or the specified set argument, but not elements that are members of both. |
union() | Create and return a new set with all elements that are in this set, or in any of the specified set arguments. |
update() | Update this set with all elements that are in this set, or in any of the specified set arguments. The resulting set has at least as many elements as any other. |
You can download the set methods in a concise PDF here:
