2021-06-16 Python Scapy WARNING: Mac address to reach destination not found. Using broadcast.

在使用Scapy模拟数据包进行主机探测等行为的时候，发送IP数据包的时候，如果本地不存在ARP信息，会在程序运行界面提示Waring信息，影响查看扫描结果
运行程序时提示Warning：

WARNING: Mac address to reach destination not found. Using broadcast.
192.168.37.27--->Host is up
WARNING: Mac address to reach destination not found. Using broadcast.
WARNING: Mac address to reach destination not found. Using broadcast.
192.168.37.31--->Host is up
WARNING: Mac address to reach destination not found. Using broadcast.
WARNING: Mac address to reach destination not found. Using broadcast.
WARNING: Mac address to reach destination not found. Using broadcast.
WARNING: Mac address to reach destination not found. Using broadcast.
WARNING: Mac address to reach destination not found. Using broadcast.
192.168.37.37--->Host is up
WARNING: Mac address to reach destination not found. Using broadcast.

可以通过logging模块控制提示报错等级，只提示Error及以上级别的报错信息：

import logging
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)

添加代码后的运行效果：

192.168.37.27--->Host is up
192.168.37.31--->Host is up
192.168.37.37--->Host is up