code: def patch_conf(settings_patch=None, settings_file=None):
      
  
      if settings_patch is None:
          settings_patch = {}
  
      reload_config()
      os.environ[ENVIRONMENT_VARIABLE] = settings_file if settings_file else ''
  
      from bernard.conf import settings as l_settings
      # noinspection PyProtectedMember
      r_settings = l_settings._settings
      r_settings.update(settings_patch)
  
      if 'bernard.i18n' in modules:
          from bernard.i18n import translate, intents
          translate._regenerate_word_dict()
          intents._refresh_intents_db()
  
      yield
docs: Reload the configuration form scratch. Only the default config is loaded,
      not the environment-specified config.
  
      Then the specified patch is applied.
  
      This is for unit tests only!
  
      :param settings_patch: Custom configuration values to insert
      :param settings_file: Custom settings file to read