diff options
Diffstat (limited to 'django/utils/functional.py')
| -rw-r--r-- | django/utils/functional.py | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/django/utils/functional.py b/django/utils/functional.py index 5c8a0c233f..5f12aa08ff 100644 --- a/django/utils/functional.py +++ b/django/utils/functional.py @@ -119,8 +119,10 @@ def lazy(func, *resultclasses): setattr(cls, method_name, meth) cls._delegate_bytes = bytes in resultclasses cls._delegate_text = str in resultclasses - assert not (cls._delegate_bytes and cls._delegate_text), ( - "Cannot call lazy() with both bytes and text return types.") + if cls._delegate_bytes and cls._delegate_text: + raise ValueError( + 'Cannot call lazy() with both bytes and text return types.' + ) if cls._delegate_text: cls.__str__ = cls.__text_cast elif cls._delegate_bytes: |