save project

my_search.py

 import random
 import random
 
 
-alist = []
-for i in range(1, 101):
-    alist.append(i)
+alist = range(1, 101)
 num = random.choice(alist)
 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 search(num,_list):
\ No newline at end of file
+    low=0
+    high=len(_list)-1
+    while True:
+        mid=(low+high)//2
+        guess=_list[mid]
+        if guess == num:
+            return mid
+        elif guess < num:
+            low=mid+1
+        elif guess > num:
+            high=mid-1
+        if not num in _list:
+            return False
+a=search(num,alist)
+print(a,num-1)
\ No newline at end of file