calibrate.py hangs if calibration name does not exist in calibrations.json

[dgruano]

calibrate.py hangs if calibration name does not exist in calibrations.json.
I guess it should stop and notify the user.

[dgruano]

A way to solve this would be to modify the server code like this:
https://github.com/FYNCH-BIO/evolver/blob/master/evolver/evolver_server.py#L108-L111

@sio.on('getcalibration', namespace = '/dpu-evolver')
async def on_getcalibration(sid, data):
    try:
        with open(os.path.join(LOCATION, CALIBRATIONS_FILENAME)) as f:
            calibrations = json.load(f)
            for calibration in calibrations:
                if calibration["name"] == data["name"]:
                    await sio.emit('calibration', calibration, namespace = '/dpu-evolver')
                    break
            else:
                 await sio.emit('calibration', None, namespace = '/dpu-evolver')

and check in the dpu's calibration.py whether the returned calibration is None or not.

The other way would be to always get the names of the calibrations when running calibrate.py and check if the name parameter matches any of them.

Any thoughts?