test.py 文件源码

def __init__(self):
        self.fh = None
        self.is_running = False
        try:
            self.fh = open(LOCK_PATH, 'w')
            fcntl.lockf(self.fh, fcntl.LOCK_EX | fcntl.LOCK_NB)
        except EnvironmentError as err:
            if self.fh is not None:
                self.is_running = True
            else:
                raise