save project

my_search.py

@@ -5,5 +5,17 @@ for i in range(1, 101):
     alist.append(i)
 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
+    hight=len(alist)-1
+    while low<=hight:
+        mid=(hight+low)//2
+        guess=alist[mid]
+        if num==guess:
+            return mid
+        elif num>guess:
+            low=mid+1
+        else:
+            hight=mid-1
+print(num)
+print(binary_search(alist,num))
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