How to find exit code or reason when atexit callback is called in Python?
You can solve this using sys.excepthook and by monkey-patching sys.exit():
import atexitimport sysclass ExitHooks(object): def __init__(self): self.exit_code = None self.exception = None def hook(self): self._orig_exit = sys.exit sys.exit = self.exit sys.excepthook = self.exc_handler def exit(self, code=0): self.exit_code = code self._orig_exit(code) def exc_handler(self, exc_type, exc, *args): self.exception = exchooks = ExitHooks()hooks.hook()def foo(): if hooks.exit_code is not None: print("death by sys.exit(%d)" % hooks.exit_code) elif hooks.exception is not None: print("death by exception: %s" % hooks.exception) else: print("natural death")atexit.register(foo)# testsys.exit(1)