runner.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.dev/sumo
# Copyright (C) 2008-2025 German Aerospace Center (DLR) and others.
# This program and the accompanying materials are made available under the
# terms of the Eclipse Public License 2.0 which is available at
# https://www.eclipse.org/legal/epl-2.0/
# This Source Code may also be made available under the following Secondary
# Licenses when the conditions for such availability set forth in the Eclipse
# Public License 2.0 are satisfied: GNU General Public License, version 2
# or later which is available at
# https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later

# @file    runner.py
# @author  Michael Behrisch
# @author  Daniel Krajzewicz
# @author  Jakob Erdmann
# @date    2011-03-04


from __future__ import print_function
from __future__ import absolute_import
import os
import sys

if "SUMO_HOME" in os.environ:
    sys.path.append(os.path.join(os.environ["SUMO_HOME"], "tools"))
import traci  # noqa
import sumolib  # noqa


def runSim():
    arrived = 0
    while traci.simulation.getMinExpectedNumber() > 0:
        traci.simulationStep()
        arrived += traci.simulation.getArrivedNumber()
    return arrived


traci.start([sumolib.checkBinary('sumo'), "-n", "input_net2.net.xml",
             "-r", "input_routes.rou.xml",
             "--route-steps", "10",
             "--no-step-log"])

traci.simulation.saveState("state.xml")
arrived = runSim()
print("first run finished with %s vehicles" % arrived)

traci.simulation.loadState("state.xml")
arrived = runSim()
print("second run finished with %s vehicles" % arrived)

traci.close()