How to use the tmuxp.exc.EmptyConfigException function in tmuxp

Parameters
        ----------
        sconf : dict
            session config, includes a :py:obj:`list` of ``windows``.

        server : :class:`libtmux.Server`
            tmux server to build session in

        Notes
        -----
        TODO: Initialize :class:`libtmux.Session` from here, in
        ``self.session``.
        """

        if not sconf:
            raise exc.EmptyConfigException('session configuration is empty.')

        # config.validate_schema(sconf)

        if isinstance(server, Server):
            self.server = server
        else:
            self.server = None

        self.sconf = sconf

def __init__(self, sconf, server=None):
        """Initialize workspace loading.

        :todo: initialize :class:`Session` from here, in ``self.session``.

        :param sconf: session config, includes a :py:obj:`list` of ``windows``.
        :type sconf: :py:obj:`dict`

        :param server:
        :type server: :class:`Server`

        """

        if not sconf:
            raise exc.EmptyConfigException('session configuration is empty.')

        # config.validate_schema(sconf)

        if isinstance(server, Server):
            self.server = server
        else:
            self.server = None

        self.sconf = sconf

sconfig = kaptan.Kaptan()
    sconfig = sconfig.import_config(config_file).get()
    # shapes configurations relative to config / profile file location
    sconfig = config.expand(sconfig, os.path.dirname(config_file))
    # propagate config inheritance (e.g. session -> window, window -> pane)
    sconfig = config.trickle(sconfig)

    t = Server(  # create tmux server object
        socket_name=socket_name, socket_path=socket_path, colors=colors
    )

    which('tmux')  # raise exception if tmux not found

    try:  # load WorkspaceBuilder object for tmuxp config / tmux server
        builder = WorkspaceBuilder(sconf=sconfig, server=t)
    except exc.EmptyConfigException:
        click.echo('%s is empty or parsed no config data' % config_file, err=True)
        return

    session_name = sconfig['session_name']

    # if the session already exists, prompt the user to attach. tmuxp doesn't
    # support incremental session building or appending (yet, PR's welcome!)
    if builder.session_exists(session_name):
        if not detached and (
            answer_yes
            or click.confirm(
                '%s is already running. Attach?'
                % click.style(session_name, fg='green'),
                default=True,
            )
        ):