docarray
diff --git a/‎docarray/array/doc_list/doc_list.py
Copy file name to clipboardExpand all lines: docarray/array/doc_list/doc_list.py
+5-2Lines changed: 5 additions & 2 deletions b/‎docarray/array/doc_list/doc_list.py
Copy file name to clipboardExpand all lines: docarray/array/doc_list/doc_list.py
+5-2Lines changed: 5 additions & 2 deletions
@@ -337,8 +337,11 @@ def __class_getitem__(cls, item: Union[Type[BaseDoc], TypeVar, str]):
 
         if isinstance(item, type) and safe_issubclass(item, BaseDoc):
             return AnyDocArray.__class_getitem__.__func__(cls, item)  # type: ignore
-        else:
-            return super().__class_getitem__(item)
+
+        if isinstance(item, object) and not isinstance(item, TypeVar):
+            raise TypeError(f'Expecting a type, got {item} of type {type(item)}')
+
+        return super().__class_getitem__(item)
 
     def __repr__(self):
         return AnyDocArray.__repr__(self)  # type: ignore