save project

my_search.py

@@ -7,14 +7,17 @@ num = random.choice(alist)
 # 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
 
 def binary_search(alist,num):
+
+    high=len(alist)-1
+    low=0
     while low <= high:
-    =(+)//2
-    =
-    if  num== :
-        print("找到了,索引是",)
-        exit()    
-    elif  < :
-        =-1
-    else:
-        =+1
-print("没有这个数")
\ No newline at end of file
+        mid=(low+high)//2
+        zjz=num_list[mid]
+        if mum == zjz:
+            print("找到了,索引是",mid)
+            exit()    
+        elif cz < zjz:
+            high=mid-1
+        else:
+            low=mid+1
+    print("没有这个数")
\ No newline at end of file