pdfrw | pdfrw is a pure Python library that reads and writes PDFs | Document Editor library
kandi X-RAY | pdfrw Summary
kandi X-RAY | pdfrw Summary
pdfrw is a pure Python library that reads and writes PDFs
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Top functions reviewed by kandi - BETA
- Format a file .
- Performs a flate filter .
- Gets the tokk tokens from the specified input stream .
- Loads an indirect object .
- Render the xobox .
- Builds a copy of the contents from the contents .
- Decodes a string using UTF8 encoding .
- Iterates over all objects in the given source .
- Identifies the PDF document encoding .
- Parses the given PDF .
pdfrw Key Features
pdfrw Examples and Code Snippets
Lines of Code : 5License : Strong Copyleft (GPL-3.0)
Copygit clone https://github.com/Jooyeshgar/amir.git
cd amir
sudo apt install python3-pip
pip3 install -r requirements.txt
sudo apt install python3-setuptools python3-gi gettext python3-passlib python3-cairocffi python3-cairosvg python3-pdfrw
License : No LicenseCopypython2 tpdfrw.py xxx.pdf
qpdf --qdf --object-streams=disable xxx.pdf xxx-decoded.pdf
python2 tpdfrw.py xxx-decoded.pdf
virtualenv venv -p python3.6
. ./venv/bin/activate
pip install -r requirements.txt
from io import BytesIO
new_bytes_object = BytesIO()
pdfrw.PdfWriter.write(new_bytes_object, filled_pdf)
# I'm not sure about the syntax, I haven't used this lib before
with open("output.txfrom pdfminer.high_level import extract_pages
from pdfminer.layout import LTTextContainer, LTChar,LTLine,LAParams
import os
path=r'/path/to/pdf'
Extract_Data=[]
for page_layout in extract_pages(path):
for element in page_layout:
import subprocess
def install(package):
subprocess.call(['pip', 'install', package])
try:
import fitz # requires fitz, PyMuPDF
except:
install('fitz')
import sys
for i, n in enumerate(range(32, 128)):
sys.stdout.write(f"{hex(n - ord('R') + 0x34).ljust(4)}: '{chr(n)}' ")
if (i + 1) % 8 == 0:
sys.stdout.write('\n')
0x2 : ' ' 0x3 : '!' 0x4 : '"' 0x5 target.pages[0].Resources.Font=font_pdf.pages[0].Resources.Font
target.pages[0].Contents.stream.replace(
"BT\n/F8 40 Tf\n1 0 0 -1 569 376 Tm\n<0034> Tj\n26 0 Td <0028> Tj\nET",
f"BT\n/F0 11 Tf\n1 0 0 -1 500 500 Tm\n(\xfrom pdfrw import PdfReader, PdfWriter, PageMerge
p1 = pdfrw.PdfReader("file1")
p2 = pdfrw.PdfReader("file2")
for page in range(len(p1.pages)):
merger = PageMerge(p1.pages[page])
merger.add(p2.pages[page]).render()
writer = PdfWfrom PyPDF4 import PdfFileWriter, PdfFileMerger, PdfFileReader
# To manipulate the PDF dictionary
import PyPDF4.pdf as PDF
import logging
def add_nums(num_entry, page_offset, nums_array):
for num in num_entry['/Nums']:
if iCommunity Discussions
Trending Discussions on pdfrw
QUESTION
I'm using pdfkit to convert html to pdf which works great, but the external links in the pdf are web links.
The pdf viewer that we are using does not recognize the pdf web links, but file open actions do work.
I've been trying to change the pdf link annotation from a web link to a file open action with the pdfrw library.
I tried to edit the pdf annotation with the following code, but it's not working.
...ANSWER
Answered 2022-Jan-11 at 20:24So after a similar battle today...
you can't define S='/Launch' as string like that. You have to use:
QUESTION
I'm currently working on a simple proof of concept for a pdf-editor application. The example is supposed to be a simplified python script showcasing how we could use the pdfrw library to edit PDF files with forms in them.
So, here's the issue. I'm not interested in writing the edited PDF to a file. The idea is that file opening and closing is going to most likely be handled by external code and so I want all the edits in my files to be done in memory. I don't want to write the edited filestream to a local file.
Let me specify what I mean by this. I currently have a piece of code like this:
...ANSWER
Answered 2021-Nov-22 at 14:07To save your altered PDF to memory in an object that can be passed around (instead of writing to a file), simply create an empty instance of io.BytesIO:
QUESTION
Right now i am Working on a project in which i have to find the font size of every paragraph in that PDF file. i have tried various python libraries like fitz, PyPDF2, pdfrw, pdfminer, pdfreader. all the libraries fetch the text data but i don't know how to fetch the font size of the paragraphs. thanks in advance..your help is appreciated.
i have tried this but failed to get font size.
...ANSWER
Answered 2021-Jun-24 at 06:43I got the solution from pdfminer. The python code for the same is given below.
QUESTION
Sorry I know there seems to be a lot about this topic. But I do not see a real resolution?
I am trying to place a Django ecommerce pizza shop for learning Django on the website. Locally this works great no issues. I matched my environment locally to that on the ENV for the server. I got this issue resolved locally when I updated Cairo on my computer. So the emulated server works great.
Python 3.8.0 Server Pythonanywhere
Here is the error and follow on info.
Error from error log on ther server. 2021-05-28 16:13:41,156: /home/williamc1jones/.virtualenvs/myvirtualenv/lib/python3.8/site-packages/weasyprint/document.py:35: UserWarning: There are known rendering problems and missing features with cairo < 1.15.4. WeasyPrint may work with older versions, but please read the note about the needed cairo version on the "Install" page of the documentation before reporting bugs. http://weasyprint.readthedocs.io/en/latest/install.html
views.py file in order app
...ANSWER
Answered 2021-Jun-01 at 22:01Yes I wanted to thank everyone for their help. While I have a time lime for my project I will dit the post to see my work around as well. Thanks.
QUESTION
import os
import re
import fitz # requires fitz, PyMuPDF
import pdfrw
import subprocess
import os.path
import sys
from PIL import Image
ANSWER
Answered 2021-Apr-30 at 14:50Using try-catch to handle missing package
Ex:
QUESTION
I'm trying to find and replace certain text with specific value in PDF. I am using python library pdfrw, since my preferred environment is python. Following is example content in first page of the document.
...ANSWER
Answered 2020-Sep-26 at 10:52In general I think pdf text can be compressed/encoded by different algorithms hence pdfrw doesn't decode text by itself. So you can't know what is the correct way in general, 'cause it is different for each case. I've tried simple pdf from here and it contains just plain text inside.
Probably you didn't figure out what is the correct correspondence between characters and hex codes is due to the fact that it may be a compressed stream - it means each code depends on the position of character in whole stream plus on the value of all previous characters. E.g. text may be zlib compressed.
Also pdf text is a sequence of commands for positioning/formatting/outputing text, so in general you have to be able to decode/encode all these commands to be able to process really any text. Your format may contain symbol table where all used symbols are mapped to hex value. To figure out correct mapping all symbols should be present in example text.
For your case you might probably use next table, for conversion, I use the fact that letter R has hex value 0x34:
QUESTION
I am following the instructions in this article for writing information to annotations in a PDF document.
The script in the aforementioned article does work. However, after the script is executed and the output file is opened, the fields remain invisible. When clicking on a annotation, the text added from the script appears. But subsequently when clicking elsewhere in the document, the text from the script disappears.
Is there some sort of flag that needs to be triggered, to inform the PDF reader that the fields have been filled?
EDIT:The script given in the article is probably not really correct.
When reading the first annotation of the unedited PDF, I get the following:
...ANSWER
Answered 2020-Feb-08 at 04:20You need to set the /NeedAppearances tag to True.
Check this out- https://github.com/pmaupin/pdfrw/issues/84#issuecomment-463493521
QUESTION
I'm trying to automate merging several PDF files and have two requirements: a) existing bookmarks AND b) pagelabels (custom page numbering) need to be retained.
Retaining bookmarks when merging happens by default with PyPDF2 and pdftk, but not with pdfrw. Pagelabels are consistently not retained in PyPDF2, pdftk or pdfrw.
I am guessing, after having searched a lot, that there is no straightforward approach to doing what I want. If I'm wrong then I hope someone can point to this easy solution. But, if there is no easy solution, any tips on how to get this going in python will be much appreciated!
Some example code:
1) With PyPDF2
...ANSWER
Answered 2020-May-22 at 11:45You need to iterate through the existing PageLabels and add them to the merged output, taking care to add an offset to the page index entry, based on the number of pages already added.
This solution also requires PyPDF4, since PyPDF2 produces a weird error (see bottom).
QUESTION
If I update the value of a form in either of these locations, both are affected. Why are they stored twice?
When updating these forms, is one preferred to be used over the other one?
(I'm using Python library pdfrw)
ANSWER
Answered 2020-May-16 at 09:18The AcroForm dictionary references all abstract form fields (directly or indirectly) to allow immediate access to all fields of a document.
Each abstract form field may have any number of widget annotations (except signature fields with at most one annotation).
Widget annotations are for displaying the form field contents. Thus, they must be attached to the page they respectively are displayed upon. So they are referenced from the Annots of the respective page.
If a form field has no widget annotation, you cannot find it from any page.
If a form field has exactly one widget annotation, you can usually find it from exactly one page, the page that annotation is on. In this case the form field object and the widget annotation object may be merged into a single object.
If a form field has more widget annotations, you can usually find it on one or more pages, depending on whether all those annotations are on the same or one different pages.
Thus,
Why are they stored twice?
They are not stored twice, each form field is stored only once, in one PDF object. But that form field object can usually be reached from multiple locations in the object model, from the global AcroForm object and from the Annots of each page that form field has a widget on.
QUESTION
In form.py I have a Form class, which allows the user input various data. The idea is to use this data to update the values in a dictionary in document.py, which is then used to populate a pdf file. The "write custom pdf" method which creates said pdf is invoked via a button in my main logic file. However, the method get_input_1 below (imported from form to doc) is not able to update the dictionary at all. I have tried various options, including the solution described here, but none of them seem to work. Any help would be highly appreciated!
gui.py
...ANSWER
Answered 2020-Mar-26 at 13:53It doesn't work because the dictionary is only updated in the __init__.
The get_input_1() function is not some sort of "dynamic" thing, it just immediately returns the current value of the text field, which is empty when the form is created.
To update the dictionary, call the function after the dialog's exec(), then process the pdf.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install pdfrw
You can use pdfrw like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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