save project

my_search.py

@@ -7,3 +7,19 @@ 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):
+
+low=0
+high=len(num_alist)-1
+while low<=high:
+    mid=(low+high)//2
+    b_num=num_list[mid]
+    if b_num==guess:
+        return mid
+    elif guess<b_num:
+        low=mid+1
+    else:
+        high=mid-1
+return None
+result=bianary_search(alist,num)
+print("老师给的数",num)
+print("它在列表里的索引是",result)
\ No newline at end of file