daemon.py 文件源码

def _make_signal_handler(self, target):
        """ Make the signal handler for a specified target object.

            :param target: A specification of the target for the
                handler; see below.
            :return: The value for use by `signal.signal()`.

            If `target` is ``None``, return ``signal.SIG_IGN``. If `target`
            is a text string, return the attribute of this instance named
            by that string. Otherwise, return `target` itself.

            """
        if target is None:
            result = signal.SIG_IGN
        elif isinstance(target, unicode):
            name = target
            result = getattr(self, name)
        else:
            result = target

        return result