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):
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+def erfei(alist1,num):
+    mi=0
+    mx=len(num_list)-1
+    while mi<mx:
+        mid=(mi+mx)//2
+        gis=alist1[mid]
+        if num==gis:
+            return mid
+        elif num>gis:
+            mi=mid+1
+        else:
+            mx=mid-1 
+        return None
+num_list = [1,3,5,8,11,15,17,18,20,21]
+num1=9
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