Sorry to hear you guys can’t get your fingerprint readers working. In case anybody else comes here wondering what python script you are refering to, it deletes fingerprints held in the device’s memory but that weren’t registered on the current OS.
Here is a version I modified to require root privaleges, and only list the fingerprints if not given a -d flag:
libfprint_delete_device_prints.py
To list the prints run:
sudo python3 libfprint_delete_device_prints.py
To delete them all run:
sudo python3 libfprint_delete_device_prints.py -d