Method _do_backward

python/singa/autograd.py:316–320

(self, *dys)

        return ys

    def _do_backward(self, *dys):
        dxs = self.backward(*dys)
        if not isinstance(dxs, tuple):
            dxs = (dxs,)
        return dxs

    def forward(self, *xs):
        """Forward propagation.