The gradient of inputs are None

meder411 / PyTorch-EMDLoss

PyTorch 1.0 implementation of the approximate Earth Mover's Distance

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Open tengteng95 opened 4 years ago

tengteng95 commented 4 years ago

Hi, thanks for your nice work. However, I found that the gradients of inputs are just None after backward. Could you please tell me why this happen?