save project

my_search.py

@@ -6,4 +6,17 @@ for i in range(1, 101):
 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):
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+def binary_search(alist,num):
+    num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+    num = 8
+    low = 0
+    high = len(num_list)-1
+    while low<=high:
+        mid = (low+high)//2
+        guess = num_list[mid]
+        if guess == num:
+            return mid  
+        elif guess < num:
+            low = mid + 1
+        elif guess > num:
+            low = mid - 1
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