NotImplementedError: only algorithm code 1 and 2 are supported. This PDF uses code 4

claird / PyPDF4

A utility to read and write PDFs with Python

obsolete-https://pythonhosted.org/PyPDF2/

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NotImplementedError: only algorithm code 1 and 2 are supported. This PDF uses code 4 #99

Open demongolem-biz opened 3 years ago

demongolem-biz commented 3 years ago

See PyPDF2. This version of encryption has still not been implemented. I see several workaround solutions such as use pikepdf to open and save the file, but to have a nondestructive version would be more proper.

likerun-cell commented 9 months ago

I also ran into this problem, is there any good solution?

pubpub-zz commented 9 months ago

PyPdf4 support is not active You should move to pypdf