save project

binary_search.py

 # 使用二分查找法，找出9和20在列表里面的索引
 # 使用二分查找法，找出9和20在列表里面的索引
-num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
\ No newline at end of file
+high = len(num_list)-1
+low = 0
+mid = 0
+def pythonNB(num):
+    mid = (low+high)//2
+    guess = num_list[mid]
+    if low < high:
+        if guess == num:
+            return guess
+        elif guess < num:
+            low = mid + 1
+            pythonNB(num)
+        else:
+            high = mid - 1
+            pythonNB(num)
+    else:
+        return '没有'+guess
+pythonNB(5)
\ No newline at end of file