How to use the wpgtk.data.config.settings function in wpgtk

def process_args(args):
    if args.light:
        settings["light_theme"] = "true"

    if args.n:
        settings["set_wallpaper"] = "false"

    if args.alpha:
        settings["alpha"] = args.alpha[0]

    if args.backend and args.backend != "list":
        if args.backend in pywal.colors.list_backends():
            settings['backend'] = args.backend
        else:
            logging.error("no such backend, please "
                          "choose a valid backend")
            exit(1)

    if args.preview:

def write_script(wallpaper, colorscheme):
    """writes the script that should be called on startup
    to restore the theme."""
    set_wall = settings.getboolean("set_wallpaper", True)
    light_theme = settings.getboolean("light_theme", True)

    flags = "-rs" if set_wall else "-nrs"
    flags += "L" if light_theme else ""

    with open(join(WPG_DIR, "wp_init.sh"), "w") as script:
        command = "wpg %s '%s' '%s'" % (flags, wallpaper, colorscheme)
        script.writelines(["#!/usr/bin/env bash\n", command])

def load_opt_list(self):
        current_backend = settings.get("backend", "wal")
        i = self.backend_list.index(current_backend)
        self.backend_combo.set_active(i)

        self.color_combo\
            .set_active(settings.getint("active", 0))
        self.gtk_switch\
            .set_active(settings.getboolean("gtk", True))
        self.command_switch\
            .set_active(settings.getboolean("execute_cmd", False))
        self.light_theme_switch\
            .set_active(settings.getboolean("light_theme", False))
        self.wallpaper_switch\
            .set_active(settings.getboolean("set_wallpaper", True))
        self.smart_sort_switch\
            .set_active(settings.getboolean("smart_sort", True))
        self.auto_adjust_switch\
            .set_active(settings.getboolean("auto_adjust", False))

        self.editor_txt\
            .set_text(settings.get("editor", "urxvt -e vim"))
        self.command_txt\
            .set_text(settings.get("command", "yes hi"))
        self.command_txt\
            .set_editable(settings.getboolean("execute_cmd", False))
        self.alpha_txt\

def get_pywal_dict(wallpaper, is_file=False):
    """get the color dictionary of a given wallpaper"""
    light_theme = settings.getboolean("light_theme", False)
    pywal.util.Color.alpha_num = settings.get("alpha", "100")

    image = pywal.image.get(os.path.join(WALL_DIR, wallpaper))

    return pywal.colors.get(
        image,
        light=(is_file and light_theme),
        backend=settings.get("backend", "wal"),
        cache_dir=WPG_DIR
    )

def get_sample_path(wallpaper, backend=None):
    """gets a wallpaper colorscheme sample's path"""
    if not backend:
        backend = settings.get("backend", "wal")

    sample_filename = "%s_%s_sample.png" % (wallpaper, backend)

    return join(SAMPLE_DIR, sample_filename)

.set_active(settings.getint("active", 0))
        self.gtk_switch\
            .set_active(settings.getboolean("gtk", True))
        self.command_switch\
            .set_active(settings.getboolean("execute_cmd", False))
        self.light_theme_switch\
            .set_active(settings.getboolean("light_theme", False))
        self.wallpaper_switch\
            .set_active(settings.getboolean("set_wallpaper", True))
        self.smart_sort_switch\
            .set_active(settings.getboolean("smart_sort", True))
        self.auto_adjust_switch\
            .set_active(settings.getboolean("auto_adjust", False))

        self.editor_txt\
            .set_text(settings.get("editor", "urxvt -e vim"))
        self.command_txt\
            .set_text(settings.get("command", "yes hi"))
        self.command_txt\
            .set_editable(settings.getboolean("execute_cmd", False))
        self.alpha_txt\
            .set_text(settings.get("alpha", "100"))

def load_opt_list(self):
        current_backend = settings.get("backend", "wal")
        i = self.backend_list.index(current_backend)
        self.backend_combo.set_active(i)

        self.color_combo\
            .set_active(settings.getint("active", 0))
        self.gtk_switch\
            .set_active(settings.getboolean("gtk", True))
        self.command_switch\
            .set_active(settings.getboolean("execute_cmd", False))
        self.light_theme_switch\
            .set_active(settings.getboolean("light_theme", False))
        self.wallpaper_switch\
            .set_active(settings.getboolean("set_wallpaper", True))
        self.smart_sort_switch\
            .set_active(settings.getboolean("smart_sort", True))
        self.auto_adjust_switch\
            .set_active(settings.getboolean("auto_adjust", False))

        self.editor_txt\
            .set_text(settings.get("editor", "urxvt -e vim"))
        self.command_txt\

def get_pywal_dict(wallpaper, is_file=False):
    """get the color dictionary of a given wallpaper"""
    light_theme = settings.getboolean("light_theme", False)
    pywal.util.Color.alpha_num = settings.get("alpha", "100")

    image = pywal.image.get(os.path.join(WALL_DIR, wallpaper))

    return pywal.colors.get(
        image,
        light=(is_file and light_theme),
        backend=settings.get("backend", "wal"),
        cache_dir=WPG_DIR
    )

def on_activate(self,  switch,  *gparam):
        if(gparam[1] == 'execute_cmd'):
            self.command_txt.set_editable(switch.get_active())
        settings[gparam[1]] = str(switch.get_active()).lower()
        self.lbl_save.set_text('')

def get_color_dict(cdic):
    """ensamble wpgtk color dictionary"""
    index = settings.getint("active")
    index = index if index > 0 else randint(9, 14)

    base_color = cdic["colors"]["color%s" % index]
    color_list = list(cdic["colors"].values())

    all_colors = {
        "wallpaper": cdic["wallpaper"],
        "alpha": cdic["alpha"],
        **cdic["special"],
        **cdic["colors"],
        **add_icon_colors(cdic),
        **keyword_colors(base_color, is_dark_theme(color_list))
    }

    try:
        user_words = {k: v.format(**all_colors)