save project

my_search.py

@@ -9,5 +9,15 @@ num = random.choice(alist)
 def binary_search(alist,num):
 def binary_search(alist,num):
     low=0
     low=0
     high=len(alist)-1
     high=len(alist)-1
-    mid=(low+high)//2
 
 
+    while low<=high:
+        mid=(low+high)//2
+        guess=alist[mid]
+        if guess==num:
+            return mid
+        elif guess<num:
+            low=mid+1
+        else:
+            high=mid-1
+    return None
+print(binary_search(alist,num))
\ No newline at end of file