diff --git a/problems/二叉树理论基础.md b/problems/二叉树理论基础.md
index f4bb8fa9..a720672e 100644
--- a/problems/二叉树理论基础.md
+++ b/problems/二叉树理论基础.md
@@ -206,7 +206,13 @@ public class TreeNode {
 
 
 Python：
-
+```python
+class TreeNode: 
+    def __init__(self, value):
+        self.value = value
+        self.left = None
+        self.right = None
+```
 
 Go：
 ```