helper.py 文件源码

def _join_daemon(self):
        try:
            try:
                # Mac, UNIX
                os.wait()
            except AttributeError:
                # Windows
                try:
                    pid = self.get_pid()
                except IOError:
                    # Assume the subprocess deleted the pidfile on shutdown.
                    pass
                else:
                    os.waitpid(pid, 0)
        except OSError:
            x = sys.exc_info()[1]
            if x.args != (10, 'No child processes'):
                raise