Given the start of a url and how many codes you want, it will generate sequential codes like: https://www.roots.uk/qr/001 as 001.png https://www.roots.uk/qr/002 as 002.png and so on, in the same directory as the script.
Update the variables for your needs in python-batch-qr-generator-script.py
and run it on the command line by
python3 python-batch-qr-generator-script.py