i18n.py 文件源码

def load_translations(self, dirname, locales, domains):
        """Loads a translation catalog.

        :param dirname:
            Path to where translations are stored.
        :param locales:
            A list of locale codes.
        :param domains:
            A list of domains to be merged.
        :returns:
            A ``babel.support.Translations`` instance, or
            ``gettext.NullTranslations`` if none was found.
        """
        trans = None
        trans_null = None
        for domain in domains:
            _trans = support.Translations.load(dirname, locales, domain)
            if isinstance(_trans, NullTranslations):
                trans_null = _trans
                continue
            elif trans is None:
                trans = _trans
            else:
                trans.merge(_trans)

        return trans or trans_null or NullTranslations()