From 54e317de651b2a4b4934caa310a7ea8118efa3ef Mon Sep 17 00:00:00 2001
From: Jojo <jojoxiaojing@icloud.com>
Date: Wed, 8 Jan 2020 15:02:10 -0800
Subject: [PATCH 1/2] Update 42.trapping-rain-water.md

Add python code
---
 problems/42.trapping-rain-water.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/problems/42.trapping-rain-water.md b/problems/42.trapping-rain-water.md
index 5674ea35c..ca21f3019 100644
--- a/problems/42.trapping-rain-water.md
+++ b/problems/42.trapping-rain-water.md
@@ -88,3 +88,28 @@ var trap = function(height) {
 };
 
 ```
+
+```python
+
+class Solution:
+    def trap(self, height: List[int]) -> int:
+        maxLeft, maxRight, volum = 0, 0, 0
+        maxLeftStack, maxRightStack = [], []
+        for h in height:
+            if h > maxLeft:
+                maxLeftStack.append(h)
+                maxLeft = h
+            else:
+                maxLeftStack.append(maxLeft)
+        for h in height[::-1]:
+            if h > maxRight:
+                maxRightStack.append(h)
+                maxRight = h
+            else:
+                maxRightStack.append(maxRight)
+        maxRightStack = maxRightStack[::-1]
+        for i in range(1, len(height) - 1):
+            minSide = min(maxLeftStack[i], maxRightStack[i])
+            volum += minSide - height[i]
+        return volum      
+```

From 7b0c8fff22ad7ceaa450d3303d8e849c285121b6 Mon Sep 17 00:00:00 2001
From: lucifer <azl397985856@gmail.com>
Date: Thu, 9 Jan 2020 10:26:18 +0800
Subject: [PATCH 2/2] Update 42.trapping-rain-water.md

---
 problems/42.trapping-rain-water.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/problems/42.trapping-rain-water.md b/problems/42.trapping-rain-water.md
index ca21f3019..f0404bf31 100644
--- a/problems/42.trapping-rain-water.md
+++ b/problems/42.trapping-rain-water.md
@@ -52,6 +52,10 @@ for(let i = 0; i < height.length; i++) {
 
 ## 代码
 
+代码支持 JavaScript，Python3:
+
+JavaScript Code:
+
 ```js
 
 /*
@@ -89,6 +93,8 @@ var trap = function(height) {
 
 ```
 
+Python Code:
+
 ```python
 
 class Solution: