IndexError: boolean index did not match indexed array along dimension 1; dimension is 32 but corresp

在cifar10实验中，期望找到指定标记的所有图像，

(x_train, y_train), (x_test, y_test)=datasets.cifar10.load_data()
print((x_train[y_train==5]).shape)

则会爆出如题错误。简言之，维度问题。通过以下更改：

print((x_train[y_train.reshape(-1)==5]).shape)