auto save

my_search.py

@@ -18,7 +18,7 @@ def binary_search(alist,num):
             low =mid+1
         else:
             high=mid-1
-    return None
+    return None 
 result=binary_search(alist,num)
 print('老师给的数是：',num)
 print('它在列表里的索引是：',result)