Improve registry docstrings.

volatility/framework/layers/registry.py

@@ -99,7 +99,11 @@ class RegistryHive(interfaces.layers.TranslationLayerInterface):
             return cell
 
     def get_key(self, key: str, return_list: bool = False) -> interfaces.objects.ObjectInterface:
-        """Gets a specific registry key by key path"""
+        """Gets a specific registry key by key path
+
+        return_list specifies whether the return result will be a single node (default) or a list of nodes from
+        root to the current node (if return_list is true).
+        """
         node_key = self.get_node(self.root_cell_offset) if not return_list else [self.get_node(self.root_cell_offset)]
         if key.endswith("\\"):
             key = key[:-1]

volatility/plugins/windows/printkey.py

@@ -40,6 +40,9 @@ class PrintKey(plugins.PluginInterface):
 
     def hive_walker(self, hive: RegistryHive, node_path: typing.Sequence[objects.Struct] = None, key_path: str = None) \
             -> typing.Generator:
+        """Walks through a set of nodes from a given node (last one in node_path).
+        Avoids loops by not traversing into nodes already present in the node_path
+        """
         if not node_path:
             node_path = [hive.get_node(hive.root_cell_offset)]
         if not isinstance(node_path, list) or len(node_path) < 1: