542             yield val1

   542             yield val1

   543             it = iter1

   543             it = iter1

   544         elif val2 is not None:

   544         elif val2 is not None:

   545             # might have been equality and both are empty

   545             # might have been equality and both are empty

   546             yield val2

   546             yield val2

   549 

   548 

   550 

   549 

   551 class addset(abstractsmartset):

   550 class addset(abstractsmartset):

   552     """Represent the addition of two sets

   551     """Represent the addition of two sets

   553 

   552