Dear Vaibhav Rungta,
just a some short comments on your code:
* why do you take the extra loop writing and reading a file?
you can easily keep record of vehicles by putting their id into
a list or even better a set if the order is not of interest:
all_vehicles_ever_arrived = set()
for vv in traci.simulation.getArrivedIDList():
all_vehicles_ever_arrived.add(vv)
...
if 'v1' not in all_vehicles_ever_arrived:
do_something_cool() #....
* speeding up vehicles, which have been stop with
setSpeed(veh_id, speed=0.) can be resumed more
realistically by setSpeed(veh_id, speed=-1)
This causes the vehicle to speed up, according to its
physics, whereas setSpeed(veh_id, speed=20.)
sets the vehicle speed to 20. (m/s) right in the next simulation
step and the speed will be unchanged, until you change it to
something else.
* you may write and read a trip file to get info's about the arrived
vehicles.
just run sumo with the option --tripinfo-output . The file can be
processed in
python by using the sumolib.
Best Marek Heinrich
simoserv GmbH
Am 09.11.2016 um 19:40 schrieb Vaibhav Rungta:
> #First interfacing program
> #TraCI
>
> import os #OS module which provides function for interacting with
> OS
> import sys #to communicate with other software
> import optparse #a python module to write command line tools
> import subprocess #allows to communicate b/w pyhton script and cmd.exe
> import random
>
> #check for environment variables
> '''
> if 'sumo-0.27.1' in os.environ:
> tools = os.path.join(os.environ['sumo-0.27.1'], 'tools')
> sys.path.append(tools)
> else:
> sys.exit("please declare environment variables 'sumo-0.27.1'")
> '''
> try:
> sys.path.append(os.path.join(os.path.dirname(
> __file__), '..', '..', '..', '..', "tools")) # tutorial in tests
> sys.path.append(os.path.join(os.environ.get("sumo-0.27.1", os.path.join(
> os.path.dirname(__file__), "..", "..", "..")), "tools")) #
> tutorial in docs
> from sumolib import checkBinary
> except ImportError:
> sys.exit(
> "please declare environment variable 'SUMO_HOME' as the root
> directory of your sumo installation (it should contain folders 'bin',
> 'tools' and 'docs')")
>
> PORT = 8813 #port used for communicating with sumo instance
>
> #sumo is started as a subprocess
> sumoBinary =
> "C:/Users/vr2002/Downloads/sumo-win64-0.27.1/sumo-0.27.1/bin/sumo-gui.exe"
> #sumoBinary is a variable which holds the path to sumo-gui, you can any
> name for this variable
> sumoProcess = subprocess.Popen([sumoBinary, "-c", "att2.sumo.cfg",
> "--remote-port", str(PORT)], stdout=sys.stdout, stderr=sys.stderr)
>
> #For any time step I am saving all the vehicle IDs in a text file and then
> verifying if the vehicle v1 is in the text file (i.e; exited system).
> #If it's in the system it's stopped irrespective of it's position depending
> on state of signal at node B2.
>
> import traci
> traci.init(PORT)
> step = 0
> while traci.simulation.getMinExpectedNumber() > 0:
> traci.simulationStep()
> get_id = traci.simulation.getArrivedIDList() #list of vehicles
> exited the system in current time step
>
> with open ("vid3.txt", "a") as vehicle_id: #opened a text file
> named vid3 located in same folder, using with closes it automatically once
> writing work is done
> vehicle_id.write (str(get_id) + '\n') #stored all the vehicle
> IDs as a string
>
> with open ("vid3.txt", "r") as read_vehicle_id: #opened a text file
> named vid3 located in same folder,
> veh_id = read_vehicle_id.read() #reading the data
> stored in text file
>
> if 'v1' in veh_id: #to verify if
> string 'v1' is present in list veh_id
> continue
> else:
> if traci.trafficlights.getPhase("B2") == 0: #signal at B2 in
> state GGrr
> traci.vehicle.setSpeed("v1", 0) #stops the vehicle
> 'v1'
> else:
> traci.vehicle.setSpeed("v1", 20) #sets the speed of
> 'v1' to 20 units
>
> step = step + 1
> traci.close()
>
> Regards,
> Vaibhav Rungta
> Graduate Student - Industrial and Systems Engineering
> Graduate Assistant - Toyota Production Systems Lab
> Research Assistant - University Transport Research Center
> 585-754-7133
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