'CustomModelCheckpoint' 中的 AttributeError：对象没有属性 'epoch'

如何解决'CustomModelCheckpoint' 中的 AttributeError：对象没有属性 'epoch'

我对此还不太熟悉，但是，我在运行代码时收到了以下错误消息：

File "C:\ConnectomeNet\model_utils.py",line 180,in on_train_end
self.epoch,self.acc,self.loss,self.val_acc)

AttributeError: 'CustomModelCheckpoint' object has no attribute 'epoch'

这是我在 CustomModelCheckpoint 中的代码部分：

class CustomModelCheckpoint(tf.keras.callbacks.Callback):    

def __init__(self,date_path,name_model): 
    self.date_path = date_path
    self.name_model = name_model

def on_epoch_end(self,epoch,logs=None):
    if 'Autoencoder' in self.name_model:
        self.acc = round(logs.get("output_acc"),2) 
        self.loss = str([round(logs.get("output_loss"),2),round(logs.get("autoencoder_loss"),2)])
        self.val_acc = round(logs.get("val_output_acc"),2) 
    else:
        self.acc = round(logs.get("accuracy"),2) 
        self.loss = round(logs.get("loss"),2)
        self.val_acc = round(logs.get("val_accuracy"),2) 
        self.epoch = epoch
    
def on_train_end(self,logs=None):
    name_model = '/{}_{:02d}-{}-{}-{}.h5'.format(self.name_model,self.epoch,self.val_acc)
    weights_path = self.date_path + name_model
    if not os.path.exists(self.date_path + "/"):
        os.makedirs(self.date_path + "/")
        
    # self.model.save_weights(self.date_path + "/",save_format='tf')
    tf.keras.models.save_model(self.model,weights_path)
    # self.model.save(weights_path)

谁能给我一个提示，告诉我出了什么问题？

非常感谢。