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my_search.py

@@ -3,7 +3,20 @@ import random
 alist = []
 for i in range(1, 101):
     alist.append(i)
-num = random.choice(alist)
+num =
 # 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):
\ No newline at end of file
+def binary_search(alist,num_list):
+    low=0
+    high=len(alist)-1
+    num=
+    while low<high:
+        mid=(low+high)//2
+        gues=alist[mid]   
+            print(num,"的索引是",mid)
+            break
+        elif guess<num:
+            low=mid+1
+        else:
+            high=mid-1
+