human
Complete this python program:
def InitAndRun(run_callback, shutdown_callback=None, init_db=True, server_logging=True):
assistant
#Here is the Python code you requested.

    """Initializes and configures the process and then the Viewfinder server.
    If \init_db\ is False, skip initializing the database client. If \server_logging\ is False,
    do not write logs to S3 and do not override the logging level to INFO.
    Creates an instance of IOLoop, and adds it to the stack context and starts it. When
    initialization is complete, invokes \run_callback\. When that has completed, invokes
    "shutdown_callback".
    Note that this function runs *synchronously*, and will not return until both "run_callback"
    and "shutdown_callback" have been executed.
    """
    options.parse_command_line()
    proc_name = os.path.basename(sys.argv[0])
    if (proc_name and (process_util.GetProcessName() is None)):
        process_util.SetProcessName(proc_name)
    io_loop = ioloop.IOLoop.instance()
    if (options.options.blocking_log_threshold is not None):
        io_loop.set_blocking_log_threshold(options.options.blocking_log_threshold)
    def _OnSignal(signum, frame):
        logging.info(('process    stopped    with    signal    %d' % signum))
        io_loop.stop()
    signal.signal(signal.SIGHUP, _OnSignal)
    signal.signal(signal.SIGINT, _OnSignal)
    signal.signal(signal.SIGQUIT, _OnSignal)
    signal.signal(signal.SIGTERM, _OnSignal)
    @gen.coroutine
    def _InvokeCallback(wrapped_callback):
        'Wraps    "run_callback"    in    function    that    returns    the    Future    that    IOLoop.run_sync    requires.'
        (yield gen.Task(wrapped_callback))
    shutdown_by_exception = False
    try:
        if server_logging:
            logging.getLogger().setLevel(logging.INFO)
            logging.getLogger().handlers[0].setLevel(logging.INFO)
        io_loop.run_sync(partial(_Init, init_db=init_db, server_logging=server_logging))
        io_loop.run_sync(partial(_InvokeCallback, run_callback))
        if (shutdown_callback is not None):
            io_loop.run_sync(partial(_InvokeCallback, shutdown_callback))
    except Exception as ex:
        if (not isinstance(ex, ioloop.TimeoutError)):
            logging.exception(('unhandled    exception    in    %s' % sys.argv[0]))
            shutdown_by_exception = True
    db_client.ShutdownDB()
    io_loop.run_sync(server_log.FinishServerLog)
    if shutdown_by_exception:
        sys.exit(1)