Hi Tianjia,
I can confirm that it isn't working because it hasn't been implemented yet.
There are a few other cases where a more complex data structure is returned
which work in TraCI only currently.
Best regards
Mirko
-----Original-Nachricht-----
Betreff: [sumo-user] Subscriptions using libsumo
Datum: 2023-10-30T19:57:21+0100
Von: "Tianjia Yang via sumo-user" <sumo-user@eclipse.org>
An: "Sumo project User discussions" <sumo-user@eclipse.org>
Hi there,
I tried moving from traci to Libsumo to improve performance but ran into a
problem. The code I use is as follows:
import traci.constants as tc
for veh_id in traci.vehicle.getIDList():
traci.vehicle.subscribe(
veh_id,
(
tc.VAR_NEXT_TLS,
tc.VAR_LANE_ID,
tc.VAR_SPEED,
tc.VAR_TYPE,
tc.VAR_TIMELOSS
),
)
veh_sub = traci.vehicle.getSubscriptionResults(veh_id)
print('veh_sub:', veh_sub)
When I use traci, it works well and outputs all five values of these five
variables I have subscribed as follows:
veh_sub: {112: (('J1', 14, 151.06976563317193, 'r'),), 81: 'E0_0', 64:
13.67491418338082, 79: 'cv', 140: 0.5058405663126192}.
However, if I add "import libsumo as traci", this subscription code seems
to only subscribe to the last four variables and outputs as follows:
veh_sub: {64: 10.471565467228892, 79: 'cv', 81: '-E2_0', 140:
0.9248398121720126}
The values of "tc.VAR_NEXT_TLS" are missing.
I have read the Libsumo documentation and noticed that subscriptions
require additional arguments. I'd like to know if this is the problem and
how to fix it.
By the way, I use Python 3.9 and Sumo 1.18.0.
Best regards,
Tianjia
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