def binary_search(list,item):
low=0
high=len(list)-1
while low<=high:
mid=(low+high)//2
guess=list[mid]
if guess ==item:
return mid
if guess>item:
high=mid-1
else:
low=mid+1
return None
my_list=[1,3,5,7,9]
s=binary_search(my_list,5)
print(s)
来源:CSDN
作者:我的吊真的大
链接:https://blog.csdn.net/weixin_44811068/article/details/104032669