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]
 num=20
 num=20
-high=len(a)-1
+high=len(num_list)-1
 low=0
 low=0
 while high>=low:
 while high>=low:
     mid=(low+high)//2
     mid=(low+high)//2