How to pass some variable values to RML file in Python?

Question

Given an RML template, used to generate PDF file in python, how can one use variables declared in a Python script in the RML template file?

def create_pdf:
   name = "My Name"

   with open('/file.rml') as rml:
         data = rml.read()
   pdf = rml2pdf.parseString(data)
   with open(f"/newpdf.pdf", 'wb') as output:
         output.write(pdf.read())
   return HttpResponse(status=200)

Here is the template file.rml:

<?xml version="1.0" encoding="utf-8" standalone="no" ?> 
<!DOCTYPE document SYSTEM "rml_1_0.dtd">
<document filename="file.rml">
   .....
    <story>
        <para style="h1-center">[[name]]</para> <!-- Name value should appear here -->
    </story>
</document>

So how do I get the name variable value in the template?