Redlines produces a Markdown text showing the differences between two strings/text

Last update: Apr 8, 2022

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Overview

Redlines

Redlines produces a Markdown text showing the differences between two strings/text. The changes are represented with strike-throughs and underlines, which looks similar to Microsoft Word's track changes. This method of showing changes is more familiar to lawyers and is more compact for long series of characters.

Redlines uses SequenceMatcher to find differences between words used.

Example

Given an original string:

The quick brown fox jumps over the lazy dog.`

And the string to be tested with:

The quick brown fox walks past the lazy dog.

The library gives a result of:

The quick brown fox jumps over walks past the lazy dog.

Which is rendered like this:

The quick brown fox ~~jumps over~~ walks past the lazy dog.

Install

pip install redlines

Usage

The library contains one class: Redlines, which is used to compare text.

jumps over walks past the lazy dog."">

from redlines import Redlines

test = Redlines("The quick brown fox jumps over the lazy dog.",
                "The quick brown fox walks past the lazy dog.")
assert test.output_markdown == "The quick brown fox jumps over walks past the lazy dog."

Alternatively, you can create Redline with the text to be tested, and compare several times to see the results.

jumps over walks past the lazy dog." assert test.compare( 'The quick brown fox jumps over the dog.') == 'The quick brown fox jumps over the ~~lazy~~ dog.'">

from redlines import Redlines

test = Redlines("The quick brown fox jumps over the lazy dog.")
assert test.compare(
    'The quick brown fox walks past the lazy dog.') == "The quick brown fox jumps over walks past the lazy dog."

assert test.compare(
    'The quick brown fox jumps over the dog.') == 'The quick brown fox jumps over the lazy dog.'

Roadmap / Contributing

Please feel free to post issues and comments. I work on this in my free time, so please excuse lack of activity.

Nice things to do

Style the way changes are presented
Other than Markdown, have other output formats (HTML? PDF?)
Associate changes with an author
Show different changes by different authors or times.

If this was useful to you, please feel free to contact me!

License

MIT License

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Comments

Read two PDFs. Compare. Redline.
What I want to do

Given two pdfs, read the text found on them, and produce a redline.

How I might be able to do this.

Using a PDF library like pdfminer, produce a list of paragraphs and compare them. Produce a new PDF of the source, and mark them with the changes.

Limitations

OCR is probably a future feature.

Layout changes might be a future feature.
opened by houfu 0