How to use the dotbot.config.ReadingError function in dotbot

from .plugins import Clean, Create, Link, Shell
        plugin_paths = []
        for directory in plugin_directories:
          for plugin_path in glob.glob(os.path.join(directory, '*.py')):
            plugin_paths.append(plugin_path)
        for plugin_path in options.plugins:
            plugin_paths.append(plugin_path)
        for plugin_path in plugin_paths:
            abspath = os.path.abspath(plugin_path)
            module.load(abspath)
        if not options.config_file:
            log.error('No configuration file specified')
            exit(1)
        tasks = read_config(options.config_file)
        if not isinstance(tasks, list):
            raise ReadingError('Configuration file must be a list of tasks')
        if options.base_directory:
            base_directory = options.base_directory
        else:
            # default to directory of config file
            base_directory = os.path.dirname(os.path.realpath(options.config_file))
        os.chdir(base_directory)
        dispatcher = Dispatcher(base_directory)
        success = dispatcher.dispatch(tasks)
        if success:
            log.info('\n==> All tasks executed successfully')
        else:
            raise DispatchError('\n==> Some tasks were not executed successfully')
    except (ReadingError, DispatchError) as e:
        log.error('%s' % e)
        exit(1)
    except KeyboardInterrupt:

tasks = read_config(options.config_file)
        if not isinstance(tasks, list):
            raise ReadingError('Configuration file must be a list of tasks')
        if options.base_directory:
            base_directory = options.base_directory
        else:
            # default to directory of config file
            base_directory = os.path.dirname(os.path.realpath(options.config_file))
        os.chdir(base_directory)
        dispatcher = Dispatcher(base_directory)
        success = dispatcher.dispatch(tasks)
        if success:
            log.info('\n==> All tasks executed successfully')
        else:
            raise DispatchError('\n==> Some tasks were not executed successfully')
    except (ReadingError, DispatchError) as e:
        log.error('%s' % e)
        exit(1)
    except KeyboardInterrupt:
        log.error('\n==> Operation aborted')
        exit(1)

def _read(self, config_file_path):
        try:
            _, ext = os.path.splitext(config_file_path)
            with open(config_file_path) as fin:
                if ext == '.json':
                    data = json.load(fin)
                else:
                    data = yaml.safe_load(fin)
            return data
        except Exception as e:
            msg = string.indent_lines(str(e))
            raise ReadingError('Could not read config file:\n%s' % msg)