189     def _from_iterable(cls, it):  member in Set
200         return self._from_iterable(value for value in other if value in self)
215         return self._from_iterable(chain)
223             other = self._from_iterable(other)
224         return self._from_iterable(value for value in self
231             other = self._from_iterable(other)
232         return self._from_iterable(value for value in other
239             other = self._from_iterable(other)
343                 it = self._from_iterable(it)
446     def _from_iterable(self, it):  member in KeysView
461     def _from_iterable(self, it):  member in ItemsView