save project

my_search.py

@@ -6,4 +6,14 @@ for i in 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 binary_search(alist,num):
\ No newline at end of file
+    while low<=high:
+        guess_num=(low+high)-1
+        guess_num=num
+        if guess_num==num:
+            return None
+        elif guess_num<num:
+            low=num+1
+        elif guess_num>num:
+            high=num-1
+binary_search
\ No newline at end of file