atexit – Atexit 模块

该模块定义了注册和注销清理函数的函数。这样注册的函数会在正常的 vm 终止时自动执行。

这些函数的运行顺序与它们注册的顺序相反；如果您注册A, B, 和C, 它们将按照C, B,的顺序运行 A。

在这些板上可用
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atexit.register(func: Callable[Ellipsis, Any], *args: Optional[Any], **kwargs: Optional[Any]) → Callable[Ellipsis, Any]

将 func 注册为要在终止时执行的函数。

要传递给 func 的任何可选参数都必须作为参数传递给register()。可以多次注册相同的函数和参数。

在正常程序终止时（例如，如果sys.exit() 被调用或 vm 执行完成），所有注册的函数都以后进先出的顺序调用。

如果在执行退出处理程序期间引发异常，则会打印回溯（除非 (unless SystemExit引发）并停止执行。

此函数返回 func，这使得可以将其用作装饰器。

atexit.unregister(func: Callable[Ellipsis, Any]) → None

从要在终止时运行的函数列表中删除 func。

unregister()如果 func 先前未注册，则静默不执行任何操作。如果 func 已被多次注册，则 atexit 调用堆栈中该函数的每次出现都将被删除。