bugfixes

Author: Diego Ardila

nucleus/dataset.py

@@ -221,9 +221,9 @@ def create_slice(
 
         :return: new Slice object
         """
-        if dataset_item_ids and reference_ids:
+        if bool(dataset_item_ids) == bool(reference_ids):
             raise Exception(
-                "You cannot specify both dataset_item_ids and reference_ids"
+                "You must specify exactly one of dataset_item_ids or reference_ids."
             )
         payload: Dict[str, Any] = {NAME_KEY: name}
         if dataset_item_ids:

nucleus/utils.py

@@ -77,7 +77,7 @@ def serialize_and_write(
 ):
     for unit in upload_unit:
         try:
-            file_pointer.write(unit.to_json())
+            file_pointer.write(unit.to_json() + "\n")
         except TypeError as e:
             type_name = type(unit).__name__
             message = (