torch.autograd.function.once_differentiable
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torch.autograd.function.once_differentiable(fn)[исходный код] -
- Тип возвращаемого значения:
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Callable[[Concatenate[_T, ~_P]], _R]
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https://docs.pytorch.org/docs/2.14/generated/torch.autograd.function.once_differentiable.html