auto save

my_search.py

@@ -8,8 +8,8 @@ num = random.choice(alist)
 def binary_search(alist,num):
 def binary_search(alist,num):
     low=0            #定义变量
     low=0            #定义变量
     high=len(alist)-1      
     high=len(alist)-1      
-    while low <= high:           #
-        mid=(low+high)//2        
+    while low <= high:           #当最小的小于最大的时
+        mid=(low+high)//2        #找到中间值
         guess=alist[mid]
         guess=alist[mid]
         if guess==num:
         if guess==num:
             return mid
             return mid