save project

my_search.py

@@ -7,3 +7,17 @@ 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):
+    high = len(alist)-1
+    low = 0
+    while low <= high:
+        mid = (high+low) // 2
+        guess = alist[mid]
+        if guess == num:
+            return mid
+        elif guess < num:
+            low = mid + 1
+        elif guess > num:
+            hide = mid - 1
+
+answer = binary_search(alist,num)
+print(answer)
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