save project

my_search.py

@@ -4,6 +4,17 @@ alist = []
 for i in range(1, 101):
 for i in range(1, 101):
     alist.append(i)
     alist.append(i)
 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
-
+def binary_search(alist,num):
+    low = 0
+hight = len(num_list)-1
+while low < hight:
+mid = (low+high)//2
+guess_num=alist[mid]
+if guess == num:
+    return mid 
+elif guess_num < bingo_num:
+    low = mid+1
+elif guess_num > dingo_num:
+    high =mid-1
+return None
 def binary_search(alist,num):
 def binary_search(alist,num):
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