Diploma

from PyPDF2 import PdfFileWriter, PdfFileReader
import io
import csv
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter

with open('names.csv') as csvfile:
    names = csv.reader(csvfile, delimiter=',')
    names = list(names)

for i in range(len(names)):
    packet = io.BytesIO()
    # create a new PDF with Reportlab
    can = canvas.Canvas(packet, pagesize=letter)
    can.setFont('Helvetica', 20)
    can.drawString(100, 100, names[i][0])
    can.save()

    #move to the beginning of the StringIO buffer
    packet.seek(0)
    new_pdf = PdfFileReader(packet)
    # read your existing PDF
    existing_pdf = PdfFileReader(open("diploma.pdf", "rb"))
    output = PdfFileWriter()
    # add the "watermark" (which is the new pdf) on the existing page
    page = existing_pdf.getPage(0)
    page.mergePage(new_pdf.getPage(0))
    output.addPage(page)
    # finally, write "output" to a real file
    outputStream = open("diploma_result_"+ str(i) + ".pdf", "wb")
    output.write(outputStream)
    outputStream.close()