Try using PyPDF2.
Instead of deleting pages, create a new document and add all pages which you don’t want to delete.
Some sample code (originally adapted from BinPress which is dead, archived here).
from PyPDF2 import PdfWriter, PdfReader
pages_to_keep = [1, 2, 10] # page numbering starts from 0
infile = PdfReader('source.pdf', 'rb')
output = PdfWriter()
for i in pages_to_keep:
p = infile.pages[i]
output.add_page(p)
with open('newfile.pdf', 'wb') as f:
output.write(f)
or
from PyPDF2 import PdfWriter, PdfReader
pages_to_delete = [3, 4, 5] # page numbering starts from 0
infile = PdfReader('source.pdf', 'rb')
output = PdfWriter()
for i in range(len(infile.pages)):
if i not in pages_to_delete:
p = infile.pages[i]
output.add_page(p)
with open('newfile.pdf', 'wb') as f:
output.write(f)