(self, layer, I, O)
Forward propagate pooling layer.

        Arguments:
            layer (PoolLayer): The pool layer object, different backends have
                               different pool layers.
            I (Tensor): Input tensor.
            O (Tensor): output tensor.
Forward propagate pooling layer.
Forward propagate pooling layer .
def fprop_pool(self, layer, I, O):
        """
        Forward propagate pooling layer.

        Arguments:
            layer (PoolLayer): The pool layer object, different backends have
                               different pool layers.
            I (Tensor): Input tensor.
            O (Tensor): output tensor.
        """
        raise NotImplementedError()
def fprop_pool ( self , layer , I , O ) : raise NotImplementedError ( )