#NEWLINE# @ staticmethod #NEWLINE# def reduce( A , B ) : #NEWLINE# #INDENT# result = B . _symmetric_difference ( A ) #NEWLINE# if ( result is not None ) : #NEWLINE# #INDENT# return result #NEWLINE# #UNINDENT# else : #NEWLINE# #INDENT# return SymmetricDifference ( A , B , evaluate = False )