增加注释

imoyao · imoyao · commit 14bf087ea6af · 2022-04-01T11:33:54.000+08:00
diff --git a/Linked_list/leetcode_707.py b/Linked_list/leetcode_707.py
@@ -35,6 +35,9 @@ def __init__(self, val, next_node=None):
 
 
 class NodeList:
+    """
+    带头结点 哨兵头
+    """
 
     def __init__(self):
         self.size = 0
