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Add Page Number to PDF file with Python(Python 给 PDF 添加 页码)
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
helpDoc = '''
Add Page Number to PDF file with Python
Python 给 PDF 添加 页码
python [PDF path]
pip install reportlab pypdf2
Support both Python2/3, But more recommend Python3
* output file will save at pdfWithNumbers/[PDF path]_page.pdf
* only support A4 size PDF
* tested on Python2/Python3@ubuntu
* more large size of PDF require more RAM
* if segmentation fault, plaese try use Python 3
* if generate PDF document is damaged, plaese try use Python 3
Lei Yang (
import reportlab
from reportlab.lib.units import mm
from reportlab.pdfgen import canvas
from PyPDF2 import PdfFileWriter, PdfFileReader
def createPagePdf(num, tmp):
c = canvas.Canvas(tmp)
for i in range(1,num+1):
c.drawString((210//2)*mm, (4)*mm, str(i))
with open(tmp, 'rb') as f:
pdf = PdfFileReader(f)
layer = pdf.getPage(0)
return layer
if __name__ == "__main__":
import sys,os
path = 'MLDS17f.pdf'
# path = '1.pdf'
if len(sys.argv) == 1:
if not os.path.isfile(path):
path = sys.argv[1]
base = os.path.basename(path)
tmp = "__tmp.pdf"
batch = 10
batch = 0
output = PdfFileWriter()
with open(path, 'rb') as f:
pdf = PdfFileReader(f,strict=False)
n = pdf.getNumPages()
if batch == 0:
batch = -n
if not os.path.isdir('pdfWithNumbers/'):
with open(tmp, 'rb') as ftmp:
numberPdf = PdfFileReader(ftmp)
for p in range(n):
if not p%batch and p:
newpath = path.replace(base, 'pdfWithNumbers/'+ base[:-4] + '_page_%d'%(p//batch) + path[-4:])
with open(newpath, 'wb') as f:
output = PdfFileWriter()
# sys.stdout.write('\rpage: %d of %d'%(p, n))
print('page: %d of %d'%(p, n))
page = pdf.getPage(p)
numberLayer = numberPdf.getPage(p)
if output.getNumPages():
newpath = path.replace(base, 'pdfWithNumbers/' + base[:-4] + '_page_%d'%(p//batch + 1) + path[-4:])
with open(newpath, 'wb') as f:

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@gmseabra gmseabra commented Jul 26, 2019

Hi there,

Thanks for sharing this code!

BTW, I tried it with a PDF of mine, that I created by merging PDFs with pypdf2. The result is interesting, where it adds the number on bottom in some pages, and on the left and rotated (as if the page was in landscape) in other pages. Do you know what may be happening here? (I can send you the files directly if you want).


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Owner Author

@DIYer22 DIYer22 commented Jul 27, 2019

Thank you for sharing your case!
I have been writing this code for a long time. And I am no longer familiar with this code or pypdf2. So, I am sorry that I don't know what happening either.


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@gmseabra gmseabra commented Jul 27, 2019

Fair enough, thanks!

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