121     def update(self, other):  argument
127     def __ior__(self, other):  argument
131     def difference(self, other):  argument
137     def difference_update(self, other):  argument
139     def __isub__(self, other):  argument
148     def intersection(self, other):  argument
152     def intersection_update(self, other):  argument
154     def __iand__(self, other):  argument
160     def issubset(self, other):  argument
164     def __lt__(self, other):  argument
167     def issuperset(self, other):  argument
171     def __gt__(self, other):  argument
174     def __eq__(self, other):  argument
179     def symmetric_difference(self, other):  argument
185     def symmetric_difference_update(self, other):  argument
187     def __ixor__(self, other):  argument
196     def union(self, other):  argument
200     def isdisjoint(self, other):  argument