save project

my_search.py

@@ -6,4 +6,18 @@ 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):
\ No newline at end of file
+def binary_search(alist,num):
+    low=0
+    higt=len(alist)-1
+    while low<=higt:
+        d=(low+higt)//2
+        f=alist[d]
+        if f==num:
+            print(f)
+            return d
+        elif f<num:
+            low=d+1
+        else:
+            higt=d-1
+
+binary_search(alist,num)
\ No newline at end of file