auto save

my_search.py

-import random
-
-alist = []
-for i in range(1, 101):
+import=[]
+for i inrange(1,101):
     alist.append(i)
     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):
+num=random.choice(alist)
+def dinary_search(alist,num)
+    low=0
+    high=len(alist)-1
\ No newline at end of file
+    while iow<high:
+        mid=(low+high)//2
+        guess=alist[mid]
+        if guess==num:
+            return mid
+        elif guess<num:
+            low=mid+1
+        else:
+            high=mid-1
+    return None
+result=binary_search(alist,num)
+print("老师给的数字是",num)
+print("它在列表里的索引是"，result)