[builder][server][proxy] make translations.py mypy-compliant

1 files changed, 5 insertions, 2 deletions

diff --git a/src/hydrilla/translations.py b/src/hydrilla/translations.py
index 1ff8788..f6e6760 100644
--- a/src/hydrilla/translations.py
+++ b/src/hydrilla/translations.py
@@ -39,7 +39,7 @@ supported_locales = [f.name for f in localedir.iterdir() if f.is_dir()]
 
 default_locale = 'en_US'
 
-def select_best_locale(supported: t.Iterable[str] = supported_locales) -> str:
+def select_best_locale(supported: t.Sequence[str] = supported_locales) -> str:
     """
     ....
 
@@ -72,7 +72,10 @@ def select_best_locale(supported: t.Iterable[str] = supported_locales) -> str:
     except:
         pass
 
-    return locale if locale in supported else default_locale
+    if locale is None or locale not in supported:
+        locale = default_locale
+
+    return locale
 
 translations: t.Dict[str, gettext.NullTranslations] = {}