Update 1049.最后一块石头的重量II.md

Added python version code

problems/1049.最后一块石头的重量II.md

@@ -178,7 +178,17 @@ class Solution {
 ```
 
 Python：
-
+```python
+class Solution:
+    def lastStoneWeightII(self, stones: List[int]) -> int:
+        sumweight = sum(stones)
+        target = sumweight // 2
+        dp = [0] * 15001
+        for i in range(len(stones)):
+            for j in range(target, stones[i] - 1, -1):
+                dp[j] = max(dp[j], dp[j - stones[i]] + stones[i])
+        return sumweight -  2 * dp[target]
+```
 
 Go：