Fixes a race condition with multiple simultaneous get requests.

[KyuubiYoru]

This fixes an issue where, if you make multiple requests at the same time, the results will sound corrupted or you will get an internal server error.

[CLAassistant]

All committers have signed the CLA.

[erogol]

Thanks for ✨PR✨

I see there are style issues. If you fix, I can merge this PR

[KyuubiYoru]

I'm not sure how i can fix this error. TTS/server/server.py:174:4: R1732: Consider using 'with' for resource-allocating operations (consider-using-with) i'm doing lock.acquire() in this line.

[WeberJulian]

I'm not sure how i can fix this error. TTS/server/server.py:174:4: R1732: Consider using 'with' for resource-allocating operations (consider-using-with) i'm doing lock.acquire() in this line.

I think the formatter prefers the with notation:

lock = Lock()
@app.route("/api/tts", methods=["GET"])
def tts():
    with lock:
        text = request.args.get("text")
        ...

rather than that:

lock = Lock()
@app.route("/api/tts", methods=["GET"])
def tts():
    lock.acquire()
    text = request.args.get("text")
    ...
    lock.release()

[KyuubiYoru]

Reformatted the file i changed failed this time?

black tests TTS notebooks recipes --check
Skipping .ipynb files as Jupyter dependencies are not installed.
You can fix this by running ``pip install black[jupyter]``
would reformat TTS/server/server.py

Oh no! 💥 💔 💥
1 file would be reformatted, 298 files would be left unchanged.
make: *** [Makefile:47: lint] Error 1
Error: Process completed with exit code 2.

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