Python 定时启动另一个 Python 脚本报错

代码：

-*- coding: utf-8 -*-

import os
from apscheduler.schedulers.blocking import BlockingScheduler


def killer():
    with open('nCov-killer.py','r') as f:
        exec(f.read())

if __name__ == "__main__": 
    scheduler = BlockingScheduler()
    scheduler.add_job(killer, 'interval', seconds=5)
    scheduler.start()

其中 nCov-killer.py 是一个外部脚本，单独运行一切正常。但是通过此代码运行 nCov-killer.py ，报错如下：

Job "killer (trigger: interval[0:00:05], next run at: 2020-02-19 21:56:42 CST)" raised an exception Traceback (most recent call last): File "C:\ProgramData\Anaconda3\lib\site-packages\apscheduler\executors\base.py", line 125, in run_job retval = job.func(*job.args, **job.kwargs) File "c:\Users\ZhYinYi\Desktop\killer\engine.py", line 8, in killer exec(f.read()) UnicodeDecodeError: 'gbk' codec can't decode byte 0xb3 in position 232: illegal multibyte sequence

希望有老哥指点一下小弟