'Set shape based parameters of this layer given an input tuple, int
or input layer.
Arguments:
in_obj (int, tuple, Layer, Tensor or dataset): object that provides shape
information for layer
Returns:
(tuple): shape of output data'

def configure(self, in_obj):

    super(RecurrentSum, self).configure(in_obj)
    self.sumscale = 1.0
    return self
