SUN397 .npy file format

[Rango-Zhang-Hang]

Hi! Thanks for releasing this great work to the public!

I followed the instructions to make the datasets referred to Vissl. But there is the problem I met: Vissl convert the SUN397 dataset into some '.npy' file compared to others' simple image folders. And the 'train.py' couldn't work with '.npy'.

So I want to ask if you used another special 'train.py' on SUN397 or made a special SUN397 dataset different from Vissl.

Thank you!