Questions about in-place operations

[misaka0502]

When I ran train_expert.py, I got this error:
RuntimeError: Output 1 of SplitBackward0 is a view and is being modified inplace. This view is the output of a function that returns multiple views. Such functions do not allow the output views to be modified inplace. You should replace the inplace operation by an out-of-place one.，this happened in:

gail-airl-ppo.pytorch/gail_airl_ppo/network/policy.py

Line 49 in 4e13a23

return reparameterize(means, log_stds.clamp_(-20, 2))

After I looked up the relevant information, I found that the error occurred in log_stds.clamp_(-20, 2). According to the information I found, clamp_() is an in-place operation because it is appended with the suffix _. It attempts to modify log_stds, but log_stds is obtained by means, log_stds = self.net(states).chunk(2, dim=-1), which violates PyTorch's rules. When I change clamp_ to clamp, the program can run normally. So why did you originally use clamp_ instead of clamp? What are the considerations here?