code: def _load_plugins(self):
          
  
          # import base plugin modules
          try:
              __import__('focus.plugin.modules')
              #import focus.plugin.modules
          except ImportError as exc:
              raise errors.PluginImport(unicode(exc))
  
          # load user defined plugin modules
          try:
              user_plugin_dir = os.path.join(self._data_dir, 'plugins')
              _import_modules(user_plugin_dir)
  
          except Exception as exc:
              raise errors.UserPluginImport(unicode(exc))
docs: Attempts to load plugin modules according to the order of available
              plugin directories.