-------------------------------------------------------------------------RuntimeError Traceback (most recent call last) in 1 with fluid.dygraph.guard(): ----> 2 model=MyDNN() #模型实例化 3 model.train() #训练模式 4 opt=fluid.optimizer.SGDOptimizer(learning_rate=train_parameters['learning_strategy']['lr'], parameter_list=model.parameters())#优化器选用SGD随机梯度下降,学习率为0.001. 5 epochs_num=train_parameters['num_epochs'] #迭代次数 in __init__(self) 6 def __init__(self): 7 super(MyDNN,self).__init__() ----> 8 self.c...