Thanks for sharing the code, but When I followed the instruction and got ready to test it on COCO I met some error ```python RuntimeError: stack expects each tensor to be equal size, but got [3, 297, 224] at entry 0 and [3, 224, 335] at entry 1 ``` At first, I think the question was about the transform ```python 'coco': [ transforms.Resize(resize), transforms.RandomCrop(crop), transforms.RandomHorizontalFlip() ] ``` but I tried several times to change the transform, still wrong, would you please do me a favor?