Method backward

python/singa/autograd.py:3530–3537

Args: dy (CTensor): data for the `dL / dy`, L is the loss. Raises: AssertionError: no backward function for this operator

(self, dy)

        return cur

    def backward(self, dy):
        """
        Args:
            dy (CTensor): data for the `dL / dy`, L is the loss.
        Raises:
            AssertionError: no backward function for this operator
        """
        assert False, ('no gradient for backward function')


def _or(a, b):