fix: merge conflicts

Author: Bilgecelik

openml/datasets/dataset.py

@@ -24,6 +24,7 @@
 import scipy.sparse
 import typing
 import xmltodict
+import warnings
 
 from openml.base import OpenMLBase
 from .data_feature import OpenMLDataFeature
@@ -831,9 +832,10 @@ def retrieve_class_labels(self, target_name: str = "class") -> Union[None, List[
         -------
         list
         """
-        for feature in self.features.values():
-            if (feature.name == target_name) and (feature.data_type == "nominal"):
-                return feature.nominal_values
+        if self.features:
+            for feature in self.features.values():
+                if (feature.name == target_name) and (feature.data_type == "nominal"):
+                    return feature.nominal_values
         return None
 
     def get_features_by_type(

openml/datasets/functions.py

@@ -1219,7 +1219,6 @@ def _get_qualities_xml(dataset_id: int) -> str:
 def _get_dataset_qualities_file(
     did_cache_dir: Union[str, None], dataset_id: int
 ) -> Union[str, None]:
-def _get_dataset_qualities_file(did_cache_dir: str, dataset_id: int) -> str:
     """API call to load dataset qualities. Loads from cache or downloads them.
 
     Features are metafeatures (number of features, number of classes, ...)