delete only root node

Author: bradh352

libyang/data.py

@@ -292,7 +292,10 @@ def __init__(self, context: "libyang.Context", cdata):
         self.free_func = None  # type: Callable[DNode]
 
     def __del__(self):
-        self.free()
+        # Delete only the root node when it goes out of scope, this will delete
+        # all children.
+        if node.parent() is None:
+            self.free()
 
     def meta(self):
         ret = {}