catch bad inputs

Author: rllin

labelbox/schema/bulk_import_request.py

@@ -222,6 +222,9 @@ def create_from_objects(cls, client, project_id: str, name: str,
         """
         _validate_ndjson(predictions)
         data_str = ndjson.dumps(predictions)
+        if not data_str:
+            raise ValueError('annotations cannot be empty')
+
         data = data_str.encode('utf-8')
         file_name = _make_file_name(project_id, name)
         request_data = _make_request_data(project_id, name, len(data_str),

labelbox/schema/project.py

@@ -410,13 +410,16 @@ def _is_url_valid(url: Union[str, Path]) -> bool:
                     file=path,
                     validate_file=True,
                 )
-        else:
+        elif isinstance(annotations, Iterable):
             return BulkImportRequest.create_from_objects(
                 client=self.client,
                 project_id=self.uid,
                 name=name,
                 predictions=annotations,  # type: ignore
             )
+        else:
+            raise ValueError(
+                f'Invalid annotations given of type: {type(annotations)}')
 
 
 class LabelingParameterOverride(DbObject):