Backend

BankBarcode uses pyBarcode to generate the barcodes.

pyBarcode

pyBarcode generates barcodes with Code128 (EAN128) since v0.8b1.

https://bitbucket.org/whitie/python-barcode

Why not another backend?

python-code128

python-code128 needs python3.

https://bitbucket.org/01100101/code128/overview/

reportlab

reportlab can generate barcodes with code128 but it only creates PDF documents.

http://www.reportlab.com