How to use the pygtftk.cmd_manager.CmdManager function in pygtftk

if exc.errno != errno.EEXIST:
                    raise
                pass

        if not os.path.exists(CmdManager.config_file):
            with open(CmdManager.config_file, 'w') as a_file:
                a_file.write("---\n")
                out_dict = {'plugin_path': os.path.join(CmdManager.config_dir,
                                                        'plugins')}
                a_file.write(yaml.dump(out_dict, default_flow_style=False))

        # ----------------------------------------------------------------------
        # Check version
        # ----------------------------------------------------------------------

        if os.path.exists(CmdManager.version_file):

            cur_version = None

            version_fh = open(CmdManager.version_file, "r")

            for i in version_fh:
                if "__version__" in i:
                    cur_version = i.split("=")[1]
                    cur_version = re.sub("[\'\" \n\r]", "", cur_version)

            if cur_version != __version__:
                cls._create_version_file()
                CmdManager.reload = True
        else:
            cls._create_version_file()

def parse_cmd_args(cls):
        """ Parse arguments of all declared commands."""

        CmdManager.args = cls.parser.parse_args(None)
        args = CmdManager.args
        cmd_name = args.command

        if cmd_name is None:
            message("Please provide a subcommand or argument (e.g. -h)", type="WARNING", force=True)
            CmdManager.parser.print_help()
            exit(0)

        lang = cls.cmd_obj_list[cmd_name].lang

        if lang == 'Python':
            if args.tmp_dir is not None:

                if not os.path.exists(args.tmp_dir):
                    msg = "Creating directory {d}."
                    message(msg.format(d=args.tmp_dir), type="INFO")

# ----------------------------------------------------------------------

        if os.path.exists(CmdManager.version_file):

            cur_version = None

            version_fh = open(CmdManager.version_file, "r")

            for i in version_fh:
                if "__version__" in i:
                    cur_version = i.split("=")[1]
                    cur_version = re.sub("[\'\" \n\r]", "", cur_version)

            if cur_version != __version__:
                cls._create_version_file()
                CmdManager.reload = True
        else:
            cls._create_version_file()

def apropos(keyword="",
            notes=False):
    """
    Search in all command description files those related to a user-defined keyword.
    """

    out_list = set()

    for i in CmdManager.cmd_obj_list:
        if keyword in CmdManager.cmd_obj_list[i].desc:
            out_list.add(i)
        if notes:
            try:
                if keyword in CmdManager.cmd_obj_list[i].notes:
                    out_list.add(i)
            except:
                pass

    if out_list:
        message(">> Keyword '" + keyword + "' was found in the following command:",
                force=True)
        for i in out_list:
            print("\t- " + i + ".")
    else:
        message(">> Keyword '" + keyword + "' was not found.",
                force=True)

def get_completion_script():
    import pygtftk.cmd_manager
    prg_list = pygtftk.cmd_manager.CmdManager.cmd_obj_list.keys()
    prg_str = " ".join(sorted(prg_list))
    return COMPLETION_SCRIPT.format(p=prg_str)

try:
            del parser.__dict__['_option_string_actions']['--help']
            del parser.__dict__['_option_string_actions']['-h']
        except:
            pass

        self.parser = parser
        self.fun = fun
        self.desc = desc
        self.logger = None
        self.lang = lang
        self.test = test
        self.rlib = rlib

        if re.search("@test", self.test):
            pygtftk.cmd_manager.CmdManager.add_command(self)
        else:
            pygtftk.utils.message(
                "%s command has no test and won't be installed." % name,
                type="WARNING")

def check_config_file(cls):

        # ----------------------------------------------------------------------
        # Config directory and config files
        # ----------------------------------------------------------------------

        CmdManager.config_dir = os.path.join(os.path.expanduser("~"),
                                             ".gtftk",
                                             CmdManager.hash)

        CmdManager.config_file = os.path.join(CmdManager.config_dir,
                                              "gtftk.cnf")

        CmdManager.dumped_plugin_path = os.path.join(CmdManager.config_dir,
                                                     "plugin.pick")

        CmdManager.version_file = os.path.join(CmdManager.config_dir,
                                               "version.py")

        if os.path.exists(os.path.join(CmdManager.config_dir, "reload")):

            CmdManager.reload = True
            os.unlink(os.path.join(CmdManager.config_dir, "reload"))
        else:
            CmdManager.reload = False

        # ----------------------------------------------------------------------

def apropos(keyword="",
            notes=False):
    """
    Search in all command description files those related to a user-defined keyword.
    """

    out_list = set()

    for i in CmdManager.cmd_obj_list:
        if keyword in CmdManager.cmd_obj_list[i].desc:
            out_list.add(i)
        if notes:
            try:
                if keyword in CmdManager.cmd_obj_list[i].notes:
                    out_list.add(i)
            except:
                pass

    if out_list:
        message(">> Keyword '" + keyword + "' was found in the following command:",
                force=True)
        for i in out_list:
            print("\t- " + i + ".")
    else:
        message(">> Keyword '" + keyword + "' was not found.",

def check_config_file(cls):

        # ----------------------------------------------------------------------
        # Config directory and config files
        # ----------------------------------------------------------------------

        CmdManager.config_dir = os.path.join(os.path.expanduser("~"),
                                             ".gtftk",
                                             CmdManager.hash)

        CmdManager.config_file = os.path.join(CmdManager.config_dir,
                                              "gtftk.cnf")

        CmdManager.dumped_plugin_path = os.path.join(CmdManager.config_dir,
                                                     "plugin.pick")

        CmdManager.version_file = os.path.join(CmdManager.config_dir,
                                               "version.py")

        if os.path.exists(os.path.join(CmdManager.config_dir, "reload")):

            CmdManager.reload = True
            os.unlink(os.path.join(CmdManager.config_dir, "reload"))
        else:
            CmdManager.reload = False

        # ----------------------------------------------------------------------
        # Load config
        # ----------------------------------------------------------------------

def _load_dumped_plugins():

        f_handler = open(CmdManager.dumped_plugin_path, "rb")
        CmdManager.cmd_obj_list, CmdManager.parser = cloudpickle.load(f_handler)
        f_handler.close()

        for cur_cmd in sorted(CmdManager.cmd_obj_list):

            # fix some issues related to dumping of the parser
            for cur_arg in CmdManager.cmd_obj_list[cur_cmd].parser._option_string_actions:

                obj = CmdManager.cmd_obj_list[
                    cur_cmd].parser._option_string_actions[cur_arg]

                if obj.default == '==stdin==':
                    CmdManager.cmd_obj_list[cur_cmd].parser._option_string_actions[
                        cur_arg].default = sys.stdin
                if obj.default == '==SUPPRESS==':
                    CmdManager.cmd_obj_list[cur_cmd].parser._option_string_actions[
                        cur_arg].default = argparse.SUPPRESS