def get_active_pids(self):
        """return a list of pids of active processes (not already stopped)"""
        return [p.pid for p in self.processes.values()
                if p.status < (DEAD_OR_ZOMBIE, UNEXISTING)]
dataset/ETHPy150Open circus-tent/circus/circus/watcher.py/Watcher.get_active_pids/operator `not in` -> `<`