Update metric argument cleaning

asreviewcontrib/insights/metrics.py

@@ -196,14 +196,19 @@ def get_metrics(
     y_absolute=False,
     version=None,
 ):
-    recall = (
-        [recall]
-        if recall and not isinstance(recall, list)
-        else [0.1, 0.25, 0.5, 0.75, 0.9]
-    )
-    wss = [wss] if wss and not isinstance(wss, list) else [0.95]
-    erf = [erf] if erf and not isinstance(erf, list) else [0.10]
-    cm = [cm] if cm and not isinstance(cm, list) else [0.1, 0.25, 0.5, 0.75, 0.9]
+    def ensure_list_of_floats(value, default):
+        if value is None:
+            return default
+        if isinstance(value, float):
+            return [value]
+        if isinstance(value, list) and all(isinstance(i, float) for i in value):
+            return value
+        raise ValueError(f"Invalid input: {value}. Must be a float or a list of floats.")
+
+    recall = ensure_list_of_floats(recall, [0.1, 0.25, 0.5, 0.75, 0.9])
+    wss = ensure_list_of_floats(wss, [0.95])
+    erf = ensure_list_of_floats(erf, [0.10])
+    cm = ensure_list_of_floats(cm, [0.1, 0.25, 0.5, 0.75, 0.9])
 
     labels = _pad_simulation_labels(state_obj, priors=priors)