opt.py 文件源码

def grad(self, inputs, output_gradients):
        # If the output is of an integer dtype, no gradient shall pass
        if 'int' in self.dtype:
            return [ipt.zeros_like().astype(theano.config.floatX)
                    for ipt in inputs]

        grads = []
        for i, inp in enumerate(inputs):
            grads.append(output_gradients[0][i])
        return grads