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my_search.py

@@ -6,4 +6,19 @@ for i in range(1, 101):
 num = random.choice(alist)
 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
 # 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):
+def binary_search(alist,num):
\ No newline at end of file
+    low=0
+    high=len(alist)-1
+    while
+        mid=(low+high)//2
+        if num==allist[mid]:
+            print(mid)
+            break
+        elif num<=alist[mid]:
+            high=mid-1
+        elif high<low:
+            print("没找到")
+            break
+        else:
+            low=mid+1
+binary_search(num,29)
\ No newline at end of file