Splitting a pdf into pages and joining again

[BjornFJohansson]

I made two scripts to split pdfs into pages and join pdfs. The join script fails to join pages that th split script produces. Tested on the pdf attached. 2019ReferenceWorkEntry.pdf

What am I doing wrong?

Cell In[23], line 4 pdf = PDF.loads(pdf_file_handle)

File ~/miniforge3/envs/bjorn311/lib/python3.11/site-packages/borb/pdf/pdf.py:83 in loads document: Document = ReadAnyObjectTransformer().transform(

...

  File ~/miniforge3/envs/bjorn311/lib/python3.11/site-packages/borb/io/read/tokenize/high_level_tokenizer.py:144 in read_indirect_object
    value = self.read_object()

  File ~/miniforge3/envs/bjorn311/lib/python3.11/site-packages/borb/io/read/tokenize/high_level_tokenizer.py:206 in read_object
    return self.read_dictionary()

  File ~/miniforge3/envs/bjorn311/lib/python3.11/site-packages/borb/io/read/tokenize/high_level_tokenizer.py:94 in read_dictionary
    assert token.get_token_type() == TokenType.NAME

AssertionError

split:

#!/home/bjorn/miniforge3/envs/bjorn311/bin python3
# -*- coding: utf-8 -*-
import sys
from pathlib import Path
from borb.pdf.document.document import Document
from borb.pdf.pdf import PDF
from tqdm import tqdm

script, *cliarg = sys.argv
pdfpaths = [Path(p) for p in cliarg] or 
[2019_ReferenceWorkEntry_.pdf](https://github.com/jorisschellekens/borb/files/14094251/2019_ReferenceWorkEntry_.pdf)
sorted(Path(".").glob("*.pdf"))

for pdfpath in tqdm(pdfpaths):

    fn = pdfpath.stem

    with open(pdfpath, "rb") as pdf_file_handle:
        pdf = PDF.loads(pdf_file_handle)

    number_of_pages = int(pdf.get_document_info().get_number_of_pages())

    for i in range(number_of_pages):
        print(i)
        outpdf = Document()
        outpdf.add_page(pdf.get_page(i))
        with open(f"{fn}_{i:03d}.pdf", "wb") as pdf_out_handle:
            PDF.dumps(pdf_out_handle, outpdf)

join:

#!/home/bjorn/miniforge3/envs/bjorn311/bin python3
# -*- coding: utf-8 -*-
# https://pdfstandalone.com/en/merge-pdf
import sys
from pathlib import Path
from borb.pdf.document.document import Document
from borb.pdf.pdf import PDF
from tqdm import tqdm

script, *cliarg = sys.argv
pdfpaths = [Path(p) for p in cliarg] or sorted(Path(".").glob("*.pdf"))
output_document = Document()
outpath = Path("output.pdf")

try:
    pdfpaths.remove(outpath)
except ValueError:
    pass

for pdfpath in tqdm(pdfpaths):

    with open(pdfpath, "rb") as pdf_file_handle:
        pdf = PDF.loads(pdf_file_handle)
        output_document.add_document(pdf)

with open(outpath, "wb") as pdf_out_handle:
    PDF.dumps(pdf_out_handle, output_document)