Examples
See Python's docs:

See Python's docs:
setset( iterable = null ) -> thisset.inclusion( A , B ) -> {-1,0,1}set.prototype[Symbol.iterator]( ) -> iterableset.prototype.keys( ) -> iterableset.prototype.len( ) -> integerset.prototype.has( key ) -> booleanset.prototype.isdisjoint( other ) -> booleanset.prototype.isequal( other ) -> booleanset.prototype.issubset( other ) -> booleanset.prototype.ispropersubset( other ) -> booleanset.prototype.issuperset( other ) -> booleanset.prototype.ispropersuperset( other ) -> booleanset.prototype.union( ...others ) -> setset.prototype.intersection( ...others ) -> setset.prototype.difference( ...others ) -> setset.prototype.symmetric_difference( other ) -> setset.prototype.copy( ) -> setset.prototype.update( ...others ) -> thisset.prototype.intersection_update( ...others ) -> thisset.prototype.difference_update( ...others ) -> thisset.prototype.symmetric_difference_update( other ) -> thisset.prototype.add( key ) -> thisset.prototype.remove( key ) -> thisset.prototype.discard( key ) -> thisset.prototype.pop( ) -> keyset.prototype.clear( ) -> this