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my_search.py

@@ -8,4 +8,11 @@ num = random.choice(alist)
 
 
 def binary_search(alist,num):
 def binary_search(alist,num):
     low = 0
     low = 0
-    
+    high = len(alist)-1
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+
+    while high>=low:
+        mid = (low + high) //2
+        cai = alist[mid]
+        if cai == num:
+            raise mid
+        elif cai <num
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