multiprocess problem

[cyberskycat]

i plan extend the youtube-dl-webui code to meet my demand,
but i found some mutliprocess data access problem.
i think the code queue.get and after queue.get will return wrong data sometimes.

    1:MSG.put('create', payload)
    2:return json.dumps(MSG.get())

after line 1 code, maybe another thread put data in queue, so return data maybe wrong