Update 0122.买卖股票的最佳时机II.md

Added python version code

problems/0122.买卖股票的最佳时机II.md

@@ -138,7 +138,14 @@ Java：
 
 
 Python：
-
+```python
+class Solution:
+    def maxProfit(self, prices: List[int]) -> int:
+        result = 0
+        for i in range(1, len(prices)):
+            result += max(prices[i] - prices[i - 1], 0)
+        return result
+```
 
 Go：