From f576698668a182659ecc5ac08669d137e6310498 Mon Sep 17 00:00:00 2001
From: jojoo15 <75017412+jojoo15@users.noreply.github.com>
Date: Sun, 16 May 2021 15:14:24 +0200
Subject: [PATCH] =?UTF-8?q?Update=200404.=E5=B7=A6=E5=8F=B6=E5=AD=90?=
 =?UTF-8?q?=E4=B9=8B=E5=92=8C.md?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

python version added
---
 problems/0404.左叶子之和.md | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/problems/0404.左叶子之和.md b/problems/0404.左叶子之和.md
index 0290dccd..5f303196 100644
--- a/problems/0404.左叶子之和.md
+++ b/problems/0404.左叶子之和.md
@@ -205,8 +205,25 @@ class Solution {
 
 
 Python：
-
-
+```Python
+**递归**
+# Definition for a binary tree node.
+# class TreeNode:
+#     def __init__(self, val=0, left=None, right=None):
+#         self.val = val
+#         self.left = left
+#         self.right = right
+class Solution:
+    def sumOfLeftLeaves(self, root: TreeNode) -> int:
+        self.res=0
+        def areleftleaves(root):
+            if not root:return
+            if root.left and (not root.left.left) and (not root.left.right):self.res+=root.left.val
+            areleftleaves(root.left)
+            areleftleaves(root.right)
+        areleftleaves(root)
+        return self.res
+```
 Go：