KeyError: '/T'

[the-superpirate]

Traceback

This is the complete Traceback I see:

  File "main.py", line 247, in process
    pdf_writer.append(pdf_reader, [page_num])
  File "venv/lib/python3.10/site-packages/pypdf/_writer.py", line 2804, in append
    self.merge(
  File "venv/lib/python3.10/site-packages/pypdf/_utils.py", line 466, in wrapper
    return func(*args, **kwargs)
  File "venv/lib/python3.10/site-packages/pypdf/_writer.py", line 3001, in merge
    self.add_filtered_articles("", srcpages, reader)
  File "venv/lib/python3.10/site-packages/pypdf/_writer.py", line 3088, in add_filtered_articles
    thr = a.get_object()["/T"]
  File "venv/lib/python3.10/site-packages/pypdf/generic/_data_structures.py", line 320, in __getitem__
    return dict.__getitem__(self, key).get_object()
KeyError: '/T'

[pubpub-zz]

Please provide version, simple code, and PDF. withouth these data we will have to close the issue as non reproductable

[the-superpirate]

pypdf==3.15.0
Code is the most simplest possible ever, something like

    def process(self, pdf_reader, pdf_writer):
        for page_num, page in enumerate(pdf_reader.pages):
            pdf_writer.append(pdf_reader, [page_num])

Unforunately PDF cannot be shared, it is private.

[the-superpirate]

Ok, actually there is a lot of such files, this one can be shared:

import pypdf
pdf = pypdf.PdfReader('bad.pdf')
w = pypdf.PdfWriter()
for n in range(len(pdf.pages)):
    w.append(pdf, [n])

bad.pdf

[pubpub-zz]

This PR should be good