save project

my_search.py

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