diff --git a/problems/0078.子集.md b/problems/0078.子集.md
index 17c4fb5c..0b2f3c09 100644
--- a/problems/0078.子集.md
+++ b/problems/0078.子集.md
@@ -205,7 +205,20 @@ class Solution {
 ```
 
 Python：
-
+```python3
+class Solution:
+    def subsets(self, nums: List[int]) -> List[List[int]]:
+        res = []  
+        path = []  
+        def backtrack(nums,startIndex):
+            res.append(path[:])  #收集子集，要放在终止添加的上面，否则会漏掉自己
+            for i in range(startIndex,len(nums)):  #当startIndex已经大于数组的长度了，就终止了，for循环本来也结束了，所以不需要终止条件
+                path.append(nums[i])
+                backtrack(nums,i+1)  #递归
+                path.pop()  #回溯
+        backtrack(nums,0)
+        return res
+```
 
 Go：
 ```Go