annotated-pdf-spec
pdfsyntax
annotated-pdf-spec | pdfsyntax | |
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1 | 8 | |
5 | 420 | |
- | - | |
10.0 | 8.5 | |
about 2 years ago | 14 days ago | |
Python | ||
- | MIT License |
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annotated-pdf-spec
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Show HN: I am building a new Python library to read/write PDF files
As others have already written, there are many slightly invalid PDF files out there in the wild that many readers can display mostly fine and which your library should also be able to handle.
If you can, grab yourself a copy of the most recent PDF 2.0 specification since it contains much more information and is much more correct in terms of how to implement things. Also have a look at the errata at https://pdf-issues.pdfa.org/32000-2-2020/index.html.
As I'm implementing a PDF library (in Ruby), I have started to collect some situations that arise in the wild but are not spec-compliant, see https://github.com/gettalong/annotated-pdf-spec. That might help you in parsing some invalid PDFs
pdfsyntax
- Show HN: PDFSyntax, a Python library to inspect and transform PDF files
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Show HN: I am building a new Python library to read/write PDF files
I never knew about the J number suffix in python: https://docs.python.org/3/reference/lexical_analysis.html#im... which it would appear is used to represent references: https://github.com/desgeeko/pdfsyntax/blob/main/tests/test_p...
I wish you good luck, this file format has tripped up many, many a developer. It blew up on a pdf I had lying around:
ValueError: could not convert string to float: b'5.0.0'
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This Week In Python
pdfsyntax – A Python PDF parsing library browse the internal structure of a PDF file
- Show HN: Browse the internal structure of a PDF file
What are some alternatives?
pdfquery - A fast and friendly PDF scraping library.
PyMuPDF - PyMuPDF is a high performance Python library for data extraction, analysis, conversion & manipulation of PDF (and other) documents.
pdfplumber - Plumb a PDF for detailed information about each char, rectangle, line, et cetera — and easily extract text and tables.
i7j-rups - RUPS is an acronym for Reading and Updating PDF Syntax. RUPS is a tool built on top of iText® that allows you to look inside a PDF document and browse the different PDF objects and content streams.
sunfish - Sunfish: a Python Chess Engine in 111 lines of code
betterwrite - :bookmark_tabs: A Creative Word Processor.
djot - A light markup language
pandoc - Universal markup converter
mupdf - mirrored from git://git.ghostscript.com/mupdf.git