running.py

import threading

class SingletonRunningState:
    _instance_lock = threading.Lock()

    def __init__(self):
        self.has_running = False

    @classmethod
    def instance(cls, *args,  **kwargs):
        with SingletonRunningState._instance_lock:
            if not hasattr(SingletonRunningState, "_instance"):
                print(f"instance")
                SingletonRunningState._instance = SingletonRunningState(*args, **kwargs)
        return SingletonRunningState._instance

    def get_has_running(self):
        with SingletonRunningState._instance_lock:
            return self.has_running

    def set_has_running(self, has_running):
        with SingletonRunningState._instance_lock:
            self.has_running = has_running