diff --git a/problems/kama54.替换数字.md b/problems/kama54.替换数字.md
index 0f8daa21..2b3d53de 100644
--- a/problems/kama54.替换数字.md
+++ b/problems/kama54.替换数字.md
@@ -235,7 +235,15 @@ func main(){
 
 
 ### python：
-
+```Python
+class Solution:
+    def change(self, s):
+        lst = list(s) # Python里面的string也是不可改的，所以也是需要额外空间的。空间复杂度：O(n)。
+        for i in range(len(lst)):
+            if lst[i].isdigit():
+                lst[i] = "number"
+        return ''.join(lst)
+```
 ### JavaScript: