The OSA script was not working anymore,  due to the recently upgraded workstations:  the new version of matplotlib needed (of course!) different commands to update the figure in real time.

The working script can be found at /opt/rtcds/userapps/release/isc/h1/scripts/osa.py

gabriele.vajente@zotws2:/opt/rtcds/userapps/release/isc/h1/scripts$ ./osa.py --help
usage: osa.py [-h] [-f FILENAME] [-t TIME] [-o OUTPUT] [-r REPROCESS]

optional arguments:
  -h, --help            show this help message and exit
  -f FILENAME, --filename FILENAME
                        File where the time series of sideband and carrier
                        powers will be saved
  -t TIME, --time TIME  Duration of plotting window in seconds
  -o OUTPUT, --output OUTPUT
                        Name of a folder where the average OSA scans will be
                        saved
  -r REPROCESS, --reprocess REPROCESS
                        Reprocess scans from a folder, and save a
                        reprocessed.txt file in there