[人工智能]训练biLSTM做文本情感分析时遇到cuda error：device-side assert triggered错误

在使用CPU训练后，仍出现out of range问题。

在训练函数中加入打印函数，查看情况。

def train(train_iter, test_iter, net, loss, optimizer, device, num_epochs):
    net = net.to(device)
    print("training on ", device)
    batch_count = 0
    for epoch in range(num_epochs):
        train_l_sum, train_acc_sum, n, start = 0.0, 0.0, 0, time.time()
        for X, y in train_iter:
            print(X.max())  #打印最大值
            print(X.min())  #打印最小值
            X = X.to(device)
            y = y.to(device)
            y_hat = net(X)
            l = loss(y_hat, y) 
            optimizer.zero_grad()
            l.backward()
            optimizer.step()
            train_l_sum += l.cpu().item()
            train_acc_sum += (y_hat.argmax(dim=1) == y).sum().cpu().item()
            n += y.shape[0]
            batch_count += 1
        test_acc = evaluate_accuracy(test_iter, net)
        print('epoch %d, loss %.4f, train acc %.3f, test acc %.3f, time %.1f sec'
              % (epoch + 1, train_l_sum / batch_count, train_acc_sum / n, test_acc, time.time() - start))

打印信息如下

tensor(30598)
tensor(-1)

原来是在做词索引时，设定默认值为-1，故出现此错误。修改为0即可。

vocab.set_default_index(0)