join_pdfs.py

#!/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)