save project

my_search.py

@@ -9,6 +9,14 @@ 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
-    guess = alist_mid
-if 
+    while low <= high:
+        mid = (low+high)//2
+        guess = alist[mid]
\ No newline at end of file
+        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