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Fixing casts to int by to_torch_as(...) calls in policies when using discrete actions #521

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Merged
merged 4 commits into from
Feb 6, 2022
Merged

Fixing casts to int by to_torch_as(...) calls in policies when using discrete actions #521

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0ac0a94
fixing cast to int of returns in PGPolicy
Kenneth-Schroeder Feb 4, 2022
41ee416
change parameter order in to_torch call
Kenneth-Schroeder Feb 4, 2022
dc45d4d
add to_torch import
Kenneth-Schroeder Feb 4, 2022
5ff3145
fix import ordering, ran all contributing make commands
Kenneth-Schroeder Feb 4, 2022
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4 changes: 2 additions & 2 deletions tianshou/policy/modelfree/pg.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
import numpy as np
import torch

from tianshou.data import Batch, ReplayBuffer, to_torch_as
from tianshou.data import Batch, ReplayBuffer, to_torch, to_torch_as
from tianshou.policy import BasePolicy
from tianshou.utils import RunningMeanStd

Expand Down Expand Up @@ -131,7 +131,7 @@ def learn( # type: ignore
result = self(minibatch)
dist = result.dist
act = to_torch_as(minibatch.act, result.act)
ret = to_torch_as(minibatch.returns, result.act)
ret = to_torch(minibatch.returns, torch.float, result.act.device)
log_prob = dist.log_prob(act).reshape(len(ret), -1).transpose(0, 1)
loss = -(log_prob * ret).mean()
loss.backward()
Expand Down