Hi Ifezue,
my proposoal for a state machine is to use enums (see
https://docs.python.org/3/library/enum.html).
In the beginning you should write something like
from enum import Enum
class VehicleStatus(Enum):
running = 0
goingToCharge = 1
charging = 2
vehicles = ["0", "1", "2", "3", "4", "5", "6", "7"]
# have a dictionary of vehicles and their states, initially all running
vehicleStatus = {}
for v in vehicles:
vehicleStatus[v] = VehicleStatus.running
At certain places change the status like this (e.g. after sending a
vehicle to the charging station)
vehicleStatus[e] = VehicleStatus.goingToCharge
you can query the status like this
if vehicleStatus[e] == VehicleStatus.charging:
One general remark
You should use very small try except blocks and print an error message
in the exception part. This helps you to identify errors and solve them
one by one. Here is an example
try:
traci.vehicle.replaceStop(e, 0,
"chargingStation_-7855681#1_0_0", duration=100, flags=32)
#chargingStation_-7855681#1_0_0
vehicleStatus[e] = VehicleStatus.goingToCharge
except Exception as ex:
print('Cannot set new stop for vehicle %s (%s)'
% (e, str(ex)))
Regards Harald
Am 27.10.21 um 02:54 schrieb Ifezue Obiako:
Just checking but are you asking me to essentially build a state
machine in Python, I am just trying to understand what seems to be
missing in my code. If so, how do you go about building states in
Python as a beginner? Any tips?
On Tue, Oct 26, 2021, 3:29 PM Ifezue Obiako <[email protected]>
wrote:
Harald
I am a little confused. Is the 'for loop' the issue and I need to
make refuel commands for each of the simulated vehicles? Or are
you saying that I need to leave the 'for loop' and make a
'running', 'goingToCharge', 'Charging' function in Python with TraCI?
On Tue, Oct 26, 2021 at 1:01 PM Harald Schaefer
<[email protected]> wrote:
Hi Ifezue,
you should put the traci call at line 65 (actualFuelLevel =
traci.vehicle.getParameter(e,
"device.battery.actualBatteryCapacity") ) also in a try block,
because at about 28000 secs Vehicle 0 disappears
You should issue the rerouting command only once. Create a
state for each vehicle ('running', 'goingToCharge',
'Charging'). Send cars only to Charging if they are in state
running, then put them in state 'goingToCharge' etc,
Regards, Harald
Am 26.10.21 um 16:35 schrieb vincentobiako:
Thanks for the response Harald. The arguments I used for the
Python script look something like this:
*python compute-pass-per-vehicle-with-sumo_3b.py -f 3600 -l
60000 -v 0 1 2 3 4 5 6 7 -g True -- -c test.sumocfg*
**
*-f 3600*
*-l 60000*
*-v 0 1 2 3 4 5 6 7 *
*-g True*
*--*
*-c test.sumocfg*
I ran the scenario in the sumo gui rather than in sumo to see
how some of the vehicles in the simulation were behaving
based on the commands in the Python script. That may be why
the vehicles are teleporting when you run it in plain sumo as
opposed to giving you a fatal error (as seen when you run in
sumo gui).
Sent from Mail
<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows
*From: *Harald Schaefer <mailto:[email protected]>
*Sent: *Tuesday, October 26, 2021 8:30 AM
*To: *[email protected]
*Subject: *Re: [sumo-user] Fatal Error during vehicle
Refueling using TraCI
Hi Ifezue,
please provide also the arguments for the python script or
add a simple run.bat file, which just calls
compute-pass-per-vehicle-with-sumo_3b.py with the correct
parameters
Running a program with traci is always slower than without.
If I run your scenario with plain sumo, I see that buses 3
and 4 are teleported:
Warning: Teleporting *vehicle '3'*; waited too long (wrong
lane), lane='374986789.109.16_1', time=5435.00.
Warning: *Vehicle '3'*ends teleporting on edge
'374986789.138', time 5435.00.
Warning: Teleporting *vehicle '4'*; waited too long (wrong
lane), lane='374986789.109.16_1', time=34896.00.
Warning: *Vehicle '4'*ends teleporting on edge
'374986789.138', time 34896.00.
Warning: Teleporting *vehicle '4'*; waited too long (wrong
lane), lane='374986789.109.16_1', time=53365.00.
Warning: *Vehicle '4'*ends teleporting on edge
'374986789.138', time 53365.00.
If you have still trouble or fatal errors, please provide the
scenario with the calling parameters, so I can reproduce your
error.
Harald
Am 23.10.21 um 00:57 schrieb vincentobiako:
Hello Everyone
I have a simulation with buses that are running on
multiple routes and when each bus reaches a certain fuel
capacity and a bus capacity equal to 0, they are required
to begin the process of refueling by going to a charging
station. I have been able to get the vehicles to move to
their recharging station when two conditions are met but
once they get to the station and begin recharging they
all seem to get stuck on the same lane or charging
location and the SUMO gui crashes and I get a Fatal Error
message in my command prompt.
I have tried shortening the charging delay and actual
charging duration that each bus spends in the process of
refueling or recharging to see if that will prevent the
Fatal Error from occurring and allow the buses to move on
to their next bus stop, but I keep getting a Fatal Error
message. Another thing I noticed when I was doing this is
that the simulation in the GUI seemed to run
significantly slower than normal for some reason and I am
not sure why.
Does anyone know why I am getting a Fatal Error message
and how I can get the buses to refuel and then move on
with rest of their bus routes after they are done
refueling/recharging? Also, why is my simulation running
slow when I execute my code in TraCI?
I have attached my testing files for reference.
Thank you
Ifezue
Sent from Mail
<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows
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