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handle num_envs > 1 in DQN #395

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handle num_envs > 1 in DQN #395

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4 changes: 2 additions & 2 deletions cleanrl/dqn.py
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Original file line number Diff line number Diff line change
Expand Up @@ -72,7 +72,6 @@ def parse_args():
help="the frequency of training")
args = parser.parse_args()
# fmt: on
assert args.num_envs == 1, "vectorized envs are not supported at the moment"

return args

Expand Down Expand Up @@ -167,6 +166,7 @@ def linear_schedule(start_e: float, end_e: float, duration: int, t: int):
envs.single_observation_space,
envs.single_action_space,
device,
n_envs=args.num_envs,
handle_timeout_termination=False,
)
start_time = time.time()
Expand All @@ -189,7 +189,7 @@ def linear_schedule(start_e: float, end_e: float, duration: int, t: int):
if "final_info" in infos:
for info in infos["final_info"]:
# Skip the envs that are not done
if "episode" not in info:
if info is None or "episode" not in info:
continue
print(f"global_step={global_step}, episodic_return={info['episode']['r']}")
writer.add_scalar("charts/episodic_return", info["episode"]["r"], global_step)
Expand Down