Structure-aware diff for html and xml documents
Structure aware diff of XML and HTML documents.
The intended use is to concisely show the edits that have been made in a document, so that authors of html content can review their work.
What do we mean by “HTML Tree Diff”?
- HTML: The inputs to the diff function are HTML documents
- Tree: It considers the full XML tree structure of the inputs, not just text based changes.
- Diff: The output is human-readable HTML, using <ins> and <del> tags to show the changes.
Command line interface
You can execute htmltreediff.cli directly as a python module, passing it html files to diff:
$ python -m htmltreediff.cli one.html two.html <h1> <del> one </del> <ins> two </ins> </h1>
You can also use htmltreediff from within a python program as a library.
For HTML Changes:
>>> from htmltreediff import diff >>> print diff('<h1>...one...</h1>', '<h1>...two...</h1>', pretty=True) <h1> ... <del> one </del> <ins> two </ins> ... </h1>
And also for text-only changes:
>>> print diff( ... 'The quick brown fox jumps over the lazy dog.', ... 'The very quick brown foxes jump over the dog.', ... html=False, ... ) The <ins>very </ins>quick brown <del>fox jumps</del><ins>foxes jump</ins> over the<del> lazy</del> dog.
Running the unit tests
The unit test suite requires the packages nose and coverage to run. Just run the run_tests.sh script, and all the tests will run, with code coverage. Code coverage should always be at 100%.
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