Now that we have a complete checkout and payment system, we can generate a PDF invoice for each order. There are several Python libraries to generate PDF files. One popular library to generate PDFs with Python code is Reportlab. You can find information about how to output PDF files with Reportlab at https://docs.djangoproject.com/en/2.0/howto/outputting-pdf/.
In most cases, you will have to add custom styles and formatting to your PDF files. You will find it more convenient to render an HTML template and convert it into a PDF file, keeping Python away from the presentation layer. We are going to follow this approach and use a module to generate PDF files with Django. We will use WeasyPrint, which is a Python library that can generate PDF files from HTML templates.
