This is, in some ways, easier to get right in many cases, because there are fewer possible resource dictionary conflicts between the watermark page and the page it is applied to.
PYTHON PDFWRITER PDF
Since pdfrw gives you low level access to PDF objects, you could mimic this behavior with pdfrw and a small bit of graphics code, but the canonical pdfrw version of this example uses a form XObject to represent the watermark. The layer merge example from Tim’s tutorial applies a watermark to a PDF by opening a source PDF and a watermark PDF, and modifying each page object by drawing the first page of the watermark PDF on top of every source PDF page. For the purposes of this article, I’m simply going to take the PyPDF2 examples from Tim’s tutorial, and rework them to use pdfrw. They need a bit more documentation, and the library needs more documentation, but I’m slowly working on that.
![python pdfwriter python pdfwriter](https://www.pythonforengineers.com/wp-content/uploads/2015/03/qt21-1024x616.jpg)
There are several examples at the pdfrw home page, including examples that use pdfrw in conjunction with reportlab. It also looks and feels a bit different, because of this focus on lower-level PDF container objects.
PYTHON PDFWRITER CODE
Also, rather than trying to create full-featured objects that provide attributes for every single thing you could do with a document, pdfrw has a more simple model that is built on modelling low-level PDF objects, and then adding some domain-specific procedural code on top of that for a few different tasks. Pdfrw has (I believe) a faster parser than the other libraries. Due to pdfrw’s form XObject support, I believe that it is the only package, aside from reportlab’s proprietary pagecatcher software, that supports reuse of elements from preexisting PDF files in reportlab output. One area where pdfrw shines is in reusing PDFs in conjunction with reportlab. I am actively working on bookmark support for pdfrw, but it has none at present. It also has specialized functions for several things such as merging bookmarks from two different PDFs. PyPDF2 supports more PDF features than pdfrw, including decryption and more types of decompression.
![python pdfwriter python pdfwriter](https://geektechstuff.files.wordpress.com/2019/07/geektechstuff_pdfmerge_html.png)
(I’m not an expert with PyPDF2 by any means, so please let me know in the comments if I have made any egregious errors.) In terms of focus, pdfrw is much closer to PyPDF2 than it is to pdfminer, so the rest of this article discusses pdfrw in relation to PyPDF2. As discussed in Tim’s tutorial, the two most popular pure Python PDF libraries are pdfminer and PyPDF2. It also has no dependencies except Python, and the current version (0.2) is available on PyPI for both Python 2 and Python 3 (2.6, 2.7, 3.3, and 3.4). What good is it?Īs you may have garnered from either the introduction, or from the name of the library, pdfrw can read and write PDF files. In this tutotial, I’ll provide a primer on pdfrw, complete with an overview of its features and some examples. Since I’ve started cleaning it up, I figured I might as well also put some effort into telling people about it. Now pdfrw is at version 0.2, and I hope not to get so far behind in the future. During the transition I’ve fixed bugs, incorporated some tests, added support for Python 3, and merged some code that someone contributed for parsing PDF 1.5 stream objects. Since Google Code shut down, I finally moved the project to Github. Tim’s article does a good job of describing pdfminer and PyPDF2, but it doesn’t go into detail with pdfrw, and for good reason.
![python pdfwriter python pdfwriter](https://geektechstuff.files.wordpress.com/2018/07/screen-shot-2018-07-03-at-12-49-02.png)
PYTHON PDFWRITER FULL
(Or maybe you haven’t actually seen Tim’s tutorial, in which case you should go read it now, because it’s chock full of good advice, and this article builds on it.) Nonetheless, you’ve decided to ignore Tim’s advice, and that’s why you’re here. _, temp_file_name = tempfile.mkstemp(prefix="email2pdf_add_update_pdf_metadata", suffix=".As Tim Arnold explains in Manipulating PDFs with Python, even beautiful PDFs are often unspeakably ugly inside, and if you can avoid having to manipulate them, you should. "-dColorConversionStrategy=/LeaveColorUnchanged " \ If subprocess.check_call("gs -v", shell=True):Ĭmd = "gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/prepress -dNOPAUSE -dQUIET -dBATCH -dDetectDuplicateImages -dCompressFonts=true -dAutoFilterColorImages=false " \
![python pdfwriter python pdfwriter](https://grillahoo.com/images/libreoffice-writer-save-document-in-pdf-python-2.png)
# GhostScript produces much smaller PDFs - we should use it if we can Def concat_pdf(in_files, out_file='concatenated.pdf'):