Fist of all, please install python packages python install -r requirements.txt

Then, run the app python manage.py runserver

To create invoice pdf file, type following url http://localhost:8000/create_pdf/output_file_name

To embedded xml into pdf file, http://localhost:8000/regular_pdf_invoice_to_facturx_invoice

############### Process of Zugeferd e-invoice ############

1. create pdf 1.7 file
2. convert pdf into PDF/A-3
3. add embedded xml into PDF/A compliance

############### References #################

1. create pdf invoice http://www.pdflib.com/pdflib-cookbook/pdfa/zugferd-invoice/

2. add embedded xml into pdf http://www.pdflib.com/pdflib-cookbook/pdfa/zugferd-add-xml-to-pdfa/

3.PyPDF2 documentation

############### ISSUES ##################### Created pdf file is not validated for PDF/A-3. you can check PDF validation here: https://www.pdf-online.com/osa/validate.aspx ############### Soluion #################### Solution:

1. check validate issues
2. PDFlib can handle all of the issues. I have used PyPDF2.

I think if we solve teh PDF validation issue, then Zugferd involice validation can be done.