是否可以获取使用flow_from_directory加载的文件名?我有:datagen=ImageDataGenerator(rotation_range=3,#featurewise_std_normalization=True,fill_mode='nearest',width_shift_range=0.2,height_shift_range=0.2,horizontal_flip=True)train_generator=datagen.flow_from_directory(path+'/train',target_size=(224,224),batch_size=ba