human
I wrote the below code

    global _translations
    t = _translations.get(language, None)
    if (t is not None):
        return t
    from django.conf import settings
    globalpath = os.path.join(os.path.dirname(sys.modules[settings.__module__].__file__), 'locale')
    if (settings.SETTINGS_MODULE is not None):
        parts = settings.SETTINGS_MODULE.split('.')
        project = import_module(parts[0])
        projectpath = os.path.join(os.path.dirname(project.__file__), 'locale')
    else:
        projectpath = None
    def _fetch(lang, fallback=None):
        global _translations
        res = _translations.get(lang, None)
        if (res is not None):
            return res
        loc = to_locale(lang)
        def _translation(path):
            try:
                t = gettext_module.translation('django', path, [loc], DjangoTranslation)
                t.set_language(lang)
                return t
            except IOError:
                return None
        res = _translation(globalpath)
        base_lang = (lambda x: x.split('-', 1)[0])
        if (base_lang(lang) in [base_lang(trans) for trans in _translations]):
            res._info = res._info.copy()
            res._catalog = res._catalog.copy()
        def _merge(path):
            t = _translation(path)
            if (t is not None):
                if (res is None):
                    return t
                else:
                    res.merge(t)
            return res
        for appname in reversed(settings.INSTALLED_APPS):
            app = import_module(appname)
            apppath = os.path.join(os.path.dirname(app.__file__), 'locale')
            if os.path.isdir(apppath):
                res = _merge(apppath)
        localepaths = [os.path.normpath(path) for path in settings.LOCALE_PATHS]
        if (projectpath and os.path.isdir(projectpath) and (os.path.normpath(projectpath) not in localepaths)):
            res = _merge(projectpath)
        for localepath in reversed(settings.LOCALE_PATHS):
            if os.path.isdir(localepath):
               ...

What's a good function header?

Here's a good function header?
assistant
#Here's a good function header.

def translation(language):