pytest-icdiff

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library 0.9 ·python
verified Apr 9, 2026

pytest-icdiff is a plugin for the pytest testing framework that significantly improves the readability of assertion error messages. By leveraging the `icdiff` utility, it provides clear, colorized, side-by-side diffs for failed equality assertions (assert ==), making it easier to pinpoint differences in complex data structures like dictionaries and lists. The current stable version is 0.9, released in December 2023, and it generally maintains an active development status with compatibility for Python 3.7 and newer.

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