How to use the honcho.environ.expand_processes function in honcho

def start_honcho(processes, env=None):
    manager = honcho.manager.Manager()
    for p in honcho.environ.expand_processes(processes, env=env):
        e = os.environ.copy()
        e.update(p.env)
        manager.add_process(p.name, p.cmd, env=e)
    manager.loop()
    sys.exit(manager.returncode)

if args.processes:
        processes = compat.OrderedDict()
        for name in args.processes:
            try:
                processes[name] = procfile.processes[name]
            except KeyError:
                raise CommandError("Process type '{0}' does not exist in Procfile".format(name))
    else:
        processes = procfile.processes

    manager = Manager(Printer(sys.stdout,
                              colour=(not args.no_colour),
                              prefix=(not args.no_prefix)))

    for p in environ.expand_processes(processes,
                                      concurrency=concurrency,
                                      env=env,
                                      quiet=quiet,
                                      port=port):
        e = os.environ.copy()
        e.update(p.env)
        manager.add_process(p.name, p.cmd, quiet=p.quiet, env=e)

    manager.loop()
    sys.exit(manager.returncode)

def command_export(args):
    if args.log == "/var/log/APP":
        args.log = args.log.replace('APP', args.app)

    procfile_path = _procfile_path(args.app_root, _choose_procfile(args))
    procfile = _procfile(procfile_path)
    env = _read_env(args.app_root, args.env)
    concurrency = _parse_concurrency(args.concurrency)
    port = _choose_port(args, env)

    processes = environ.expand_processes(procfile.processes,
                                         concurrency=concurrency,
                                         env=env,
                                         port=port)

    export_ctor = export_choices[args.format].load()
    export = export_ctor(template_dir=args.template_dir)

    context = {
        'app': args.app,
        'app_root': os.path.abspath(args.app_root),
        'log': args.log,
        'shell': args.shell,
        'user': args.user or args.app,
    }

    _mkdir(args.location)