If you want to add a page with a text created on the fly to an existing pdf, use this code. I made this to add a valutation to a student work made in a pdf. When you run this script it asks you to add the name, grade, date and then it attaches the text in a new page at the end and saves a new pdf.
from PyPDF2 import PdfFileWriter, PdfFileReader, PdfFileMerger
import io
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter
from glob import glob
import os
def createNewPdf(text):
packet = io.BytesIO()
# create a new PDF with Reportlab
can = canvas.Canvas(packet, pagesize=letter)
counter = 0
for line in text:
can.drawString(50, 700 - counter, line)
counter += 20
can.save()
# move to the beginning of the StringIO buffer
packet.seek(0)
# read the pdf yet created
new_pdf = PdfFileReader(packet)
return new_pdf
def readExistigPdf():
# read your existing PDF
print("Current directory", os.getcwd())
filename = glob("*.pdf")[0]
existing_pdf = PdfFileReader(open(filename, "rb"))
return existing_pdf, filename
def merge(page=0):
output = PdfFileWriter()
page = existing_pdf.getPage(page)
page.mergePage(new_pdf.getPage(0))
# add the "watermark" (which is the new pdf) on the existing page
output.addPage(page)
# finally, write "output" to a real file
with open(filename[:-4] + "_valutazione.pdf", "wb") as outputStream:
output.write(outputStream)
def mergeFull(page=0):
output = PdfFileWriter()
merger = PdfFileMerger()
for file in [existing_pdf, new_pdf]:
merger.append(file)
# add the "watermark" (which is the new pdf) on the existing page
# finally, write "output" to a real file
with open(filename[:-4] + "_valutazione.pdf", "wb") as outputStream:
merger.write(outputStream)
testo = """
This is a test
Valutazione 16/18
""".splitlines()
new_pdf = createNewPdf(testo)
existing_pdf, filename = readExistigPdf()
# Put a page as argument starting from 0=first page
mergeFull()
os.startfile(filename[:-4] + "_valutazione.pdf")
Version 2
from PyPDF2 import PdfFileWriter, PdfFileReader, PdfFileMerger
import io
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter
from glob import glob
import os
import tkinter as tk
from tkinter import filedialog
root = tk.Tk()
filename = filedialog.askopenfilename(initialdir = ".",title = "Select file",filetypes = (("pdf files","*.pdf"),("all files","*.*")))
def createNewPdf(text):
packet = io.BytesIO()
# create a new PDF with Reportlab
can = canvas.Canvas(packet, pagesize=letter)
counter = 0
for line in text:
can.drawString(50, 700 - counter, line)
counter += 20
can.save()
# move to the beginning of the StringIO buffer
packet.seek(0)
# read the pdf yet created
new_pdf = PdfFileReader(packet)
return new_pdf
def readExistigPdf():
# read your existing PDF
# print("Current directory", os.getcwd())
# filename = glob(os.getcwd() + "\\*.pdf")[0]
# print(filename)
existing_pdf = PdfFileReader(open(filename, "rb"))
return existing_pdf, filename
def merge(page=0):
output = PdfFileWriter()
page = existing_pdf.getPage(page)
page.mergePage(new_pdf.getPage(0))
# add the "watermark" (which is the new pdf) on the existing page
output.addPage(page)
# finally, write "output" to a real file
with open(filename[:-4] + "_valutazione.pdf", "wb") as outputStream:
output.write(outputStream)
def mergeFull(page=0):
output = PdfFileWriter()
merger = PdfFileMerger()
for file in [existing_pdf, new_pdf]:
merger.append(file)
# add the "watermark" (which is the new pdf) on the existing page
# finally, write "output" to a real file
with open(filename[:-4] + "_valutazione.pdf", "wb") as outputStream:
merger.write(outputStream)
prova = input("Prova: ")
name = input("Nome: ")
voto = input("voto: ")
data = input("Data: ")
testo = f"""
Prova {prova}
Alunno/a: {name}
Valutazione {voto}
Castelnuovo Cilento, {data}
Prof. Giovanni Gatto
""".splitlines()
new_pdf = createNewPdf(testo)
existing_pdf, filename = readExistigPdf()
# Put a page as argument starting from 0=first page
mergeFull()
os.startfile(filename[:-4] + "_valutazione.pdf")
