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How to use start_ovs_vswitchd method in autotest

Best Python code snippet using autotest_python

P4vSwitch.py

...31        cmd += "--remote=punix:/usr/local/var/run/openvswitch/db.sock "32        cmd += "--remote=db:Open_vSwitch,Open_vSwitch,manager_options --pidfile"33        print cmd34        return Popen(shlex.split(cmd))35    def start_ovs_vswitchd(self):36        cmd  = "sudo ./vswitchd/ovs-vswitchd --dpdk -c 0x1 -n 4 -- "37        cmd += "unix:/usr/local/var/run/openvswitch/db.sock --pidfile"38        print cmd39        return Popen(shlex.split(cmd))40    def add_flows(self, command_file):41        with open(command_file, 'r') as fin:42            for line in fin:43                cmd = """sudo {0}/{1}""".format('utilities', line)44                print cmd45                p = Popen(shlex.split(cmd))46                p.wait()47    def stop_ovs_vswitchd(self):48        cmd = 'sudo pkill ovs-vswitchd'49    	args = shlex.split(cmd)50    	p = Popen(args)51    	p.wait()52    def stop_ovsdb_server(self):53        cmd = 'sudo pkill ovsdb-server'54    	args = shlex.split(cmd)55    	p = Popen(args)56    	p.wait()57    def compile(self):58        if (os.path.isfile(self.p4_program)):59            self.clean()60            self.configure()61            self.make_switch()62        else:63            print "'%s' is not a valid file" % self.p4_program64    def run(self):65        ovsdb = self.start_ovsdb_server()66        vswitchd = self.start_ovs_vswitchd()67        time.sleep(1)68        self.add_flows(os.path.join(dir_path, 'vs_commands.txt'))69        if (os.path.isfile(self.rules)):70		self.add_flows(self.rules)71        else:72            print "Rules are not added"73        vswitchd.wait()74	ovsdb.wait()75    def stop_all(self):76        self.stop_ovs_vswitchd()77        self.stop_ovsdb_server()78    def clean(self):79        cmd = 'make clean'80        p = Popen(shlex.split(cmd))...

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