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__repr__ and __str__ Return String Representations

class adder:      def __init__(self, value=0):          self.data = value                          def __add__(self, other):          self.data += other                     class addrepr(adder):                              def __repr__(self):                               return 'addrepr(%s)' % self.data      x = addrepr(2)                                x + 1                                         x                                             print x                                       str(x), repr(x)