Update 0055.跳跃游戏.md

Added python version code

problems/0055.跳跃游戏.md

@@ -89,7 +89,19 @@ Java：
 
 
 Python：
-
+```python
+class Solution:
+    def canJump(self, nums: List[int]) -> bool:
+        cover = 0
+        if len(nums) == 1: return True
+        i = 0
+        # python不支持动态修改for循环中变量,使用while循环代替
+        while i <= cover:
+            cover = max(i + nums[i], cover)
+            if cover >= len(nums) - 1: return True
+            i += 1
+        return False
+```
 
 Go：