Change default set_to_none=true
in zero_grad
methods
#4438
Merged
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The default was changed to
false
in this PR with the intention of matching PyTorch#2741
However, since then, PyTorch has changed their default to
true
.https://pytorch.org/docs/stable/_modules/torch/optim/optimizer.html#Optimizer.zero_grad
pytorch/pytorch#92731