第一层:Conv2D(32, (3, 3), input_shape=(28, 28, 1))
x_train.shape = (60000, 28, 28), y_train.shape = (60000, 1)
那么 model.fit(x_train, y_train)之前,需要reshape一下x_train和y_train吗
x_train.shape = (60000, 28, 28), y_train.shape = (60000, 1)
那么 model.fit(x_train, y_train)之前,需要reshape一下x_train和y_train吗