Discover how to manipulate PDFs using Python. Gain hands-on experience with real-life scenarios and broaden your knowledge in handling and processing PDF files efficiently.

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mypdftoolbox.tar.gz

pdf_compare

pdf_did_metadata

pdf_xmp_metadata

pdf_compute_checksum

pdf_merger

pdf_pages_splitter

pdf_pages_rotator

pdf_pages_remover

pdf_pages_shuffler

pdf_pages_watermarker

pdf_convert2img

pdf_extract_tables

pdf_extract_images

pdf_extract_links

pdf_annotator

pdf_redactor

pdf_parser

pdf_convert2docx

pdf_convert2pptx

pdf_compress

pdf_secure

pdf_crack

pdf_create

pdf_sign

pdf_scan

pdf_comment

pdf_compare_files

pdf_attach

pdf_extract_attachments

pdf_embed_js

pdf_change_rights

This course will provide you with hands-on experience in PDF manipulation using the Python programming language. It integrates the most common real-life scenarios into its proceedings and supplies you with a framework of "how to do it". 

This course is addressed to Python programmers who seek to broaden their knowledge in the Python programming language. Moreover, it targets those who are eager to gain in-depth experience in handling and processing PDF files which constitute a large part of our day-to-day lives.

PDF Management in Python

# Watermark in a nutshell ##

A **watermark** is a semi-transparent line of text or an image added into a file to indicate that the file is owned by a person or an organization, and that the file should not be replicated or spread without their permission. In most instances, watermarks are visible, but in exceptional cases, special text-based watermarks are embedded in a way that they become visible only after the document is scanned or printed.

To safeguard their confidential information and intellectual property many companies continue to add bespoke watermarks to their documents.

The following figure is a diagrammatic representation of the watermark process:

# Why watermarks count ##
The fundamental cases requiring document watermarks are listed below:

## Smooth documents classification ###

Watermarks might be embedded in documents to imply their handling process. For example, a document watermarked by the label "Confidential" shows the users in charge that they should take appropriate security measures when working with such documents.

## Efficiency in tracking documents ###

Embedding customized watermarks that encompass attributes like user name, timestamp, or revision number enhances the document's versioning control.

## Controlling illegitimate distribution ###

Watermarks are a reliable way to prove the ownership of a document and its inner content.

Whenever a document has a watermark embodying identification information, it becomes difficult to distribute without revealing its original owner. 

It's worth noting that without watermarks, substantial digital assets might be subject to content theft or illegitimate use.

# How to watermark PDFs ##

Although many companies realize the major advantage of embedding watermarks in their documents, most of the time, they don’t have the required tools to execute such tasks in an efficient manner and at scale. 

An increasing number of free watermarking web applications are available, but these sites typically require us to upload the file to be watermarked. This often creates a huge security risk. 


# Scope ##

The goal of this lesson is to develop a lightweight command-line-based utility to add or remove text watermarks from a PDF file, using the Python programming language.

A watermark is associated with the PDF viewing session. It appears in front of the document content like a stamp, and is not applied to the document source that remains secure and intact. 

# Prerequisites ##

The following components are required:

* PyPDF4 is a Pure-Python PDF library able to split, merge, crop, and transform the pages of PDF files. Moreover, It allows adding custom data, viewing options, and passwords to PDF files.

* ReportLab is an ultimate open-source library for creating complex, data-driven PDF documents and custom vector graphics. This library is free, open-source, and written in Python. 

|Library|Version |
|:-| - |:-| - |
|PyPDF4|1.27.0|
|Reportlab|3.5.59|


# Let's build our utility ##

* Let’s define the configuration parameters of our watermark overlay:

|Parameter|Description |
|:-|-|:-|-|
|PAGESIZE|The size of the page of the PDF document.|
|FONTNAME|The font "Helvetica" of the text watermark and its rendering style "Bold".|
|FONTSIZE|The size of the font of the text watermark.|
|COLOR|The color of the text watermark.|

Learn to dynamically add and remove watermarks from PDF pages.

How to Dynamically Watermark PDF Pages

Introduction

PDF Management Core Functions

Pages Processing

Content Processing

Document Processing

Conclusion

Appendices

How to Dynamically Watermark PDF Pages

Watermark in a nutshell

Why watermarks count

Smooth documents classification