python - 在研究 VGG-16 分类模型时。出错了

Question

我是 tf-python 的新手。我遵循了本教程 - https://www.kaggle.com/loaiabdalslam/brain-tumor-mri-classification-vgg16#VGG-16和In[34] ,having error "ValueError: None values not supported".

import time

start = time.time()

vgg16_history = vgg16.fit_generator(
    train_generator,
    steps_per_epoch=50,
    epochs=120,
    validation_data=validation_generator,
    validation_steps=30,
)


end = time.time()
print(end - start)

标签： pythontensorflow