有没有办法让python程序在崩溃时运行一个动作？

Question

我有一个带有循环的python脚本,每次经常崩溃并有各种异常,需要重新启动.有没有办法在发生这种情况时运行一个动作,以便我可以收到通知？

Answer 1

您可以通过为sys.excepthook处理程序分配自定义函数来安装异常挂钩.只要存在未处理的异常(因此退出解释器的异常),就会调用该函数.

import sys

def myexcepthook(type, value, tb):
    import traceback
    from email.mime.text import MIMEText
    from subprocess import Popen, PIPE
    tbtext = ''.join(traceback.format_exception(type, value, tb))
    msg = MIMEText("There was a problem with your program:\n\n" + tbtext)
    msg["From"] = "me@example.com"
    msg["To"] = "you@example.com"
    msg["Subject"] = "Program exited with a traceback."
    p = Popen(["/usr/sbin/sendmail", "-t"], stdin=PIPE)
    p.communicate(msg.as_string())

sys.excepthook = myexcepthook

只要sendmail您的系统上有工作命令,此异常挂钩会在程序退出时通过电子邮件向您发送回溯.