code: def set_size(self, size):
          '''
          Size is only set the first time it is called
  
          Size that is set is returned
          '''
          if self.size is None:
              self.size = size
              return size
          else:
              return self.sizf set_size(self, size):
          '''
          Size is only set the first time it is called
  
          Size that is set is returned
          '''
          if self.size is None:
              self.size = size
              return size
          else:
              return self.size
docs: Size is only set the first time it is called
  
          Size that is set is returned