Support integer indexing into lists

scone/head/variables.py

@@ -113,9 +113,13 @@ class Variables:
         keys = name.split(".")
         try:
             for k in keys:
-                if not isinstance(current, dict):
-                    raise ValueError(f"non-dictionary encountered when getting {name}")
-                current = current[k]
+                if isinstance(current, dict):
+                    current = current[k]
+                elif isinstance(current, list):
+                    current = current[int(k)]
+                else:
+                    raise ValueError(f"non-dictionary, non-list encountered when getting {name}")
+
             return current
         except KeyError:
             if self._delegate: