save project

my_search.py

-import random
-
-alist = []
-for i in range(1, 101):
-    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
-
-def binary_search(alist,num):
+bingo_num = 20 
+num_list = [1,3,5,8,11,15,17,18,20,21]
+def search(alist,num):
+    low = 0
+    high = len(alist)-1
+    while low <= high:
+        mid = (low+high) // 2
+        guess = alist[mid]
+        if guess == num:
\ No newline at end of file
+            return mid
+        elif guess < num:
+            low = mid+1
+        elif guess > num:
+            high = mid-1
+    return None
+result = search(num_list,11)
+print(result) 
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