save project

my_search.py

@@ -7,3 +7,20 @@ 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
 # 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):
 def binary_search(alist,num):
+    low=0
+    high=len(num_list)-1
+    while low <= high:
+        mid = (low+high)//2
+        guess_num=num_list[mid]
+        if guess_num==bingo_num:
+            return mid
+        elif guess_num < bingo_num:
+            low=mid+1
+        elif guess_num < bingo_num:
+            low=mid-1 
+    return None
+result=binary_search(alist,num)
+print("老师给的数是：",num)
+print("找到了，它在列表里的索引：",mid)
+        
+    
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