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fix: restore parameters on TRPO line search failure #1287

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fix: restore parameters on TRPO line search failure #1287

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2 changes: 1 addition & 1 deletion tianshou/algorithm/modelfree/trpo.py
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Original file line number Diff line number Diff line change
Expand Up @@ -183,7 +183,7 @@ def _update_with_batch( # type: ignore[override]
if i < self.max_backtracks - 1:
step_size = step_size * self.backtrack_coeff
else:
self._set_from_flat_params(self.policy.actor, new_flat_params)
self._set_from_flat_params(self.policy.actor, flat_params)
step_size = torch.tensor([0.0])
warnings.warn(
"Line search failed! It seems hyperparamters"
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