After 16 months of public beta and 8 beta versions, python-constraint 2 is ready for release 🎉
It brings major performance optimizations, an overhaul of the project structure, and automated testing and reporting.
This new version can be installed with pip install python-constraint.

Summary of major optimizations:

• Cythonized the package and added typing
• Added the (now default) OptimizedBacktracking solver based on #62
• Added the MaxProd and MinProd constraints
• Optimized the Function and MaxSum constraints
• Wider choice of output formats (use getSolutionsOrderedList or getSolutionsAsListDict)
• Overall optimization of common bottlenecks

In all, this results in a two- to three- orders of magnitude speedup over the old version.

Various engineering changes were made as well, including:

• Split the codebase into multiple files for convenience
• Achieved and requires test coverage of at least 80%
• Switched from setup.py to pyproject.toml
• Added nox for local testing against all supported Python versions
• Added ruff for code style testing
• Dropped Python 3.4, 3.5, 3.6, 3.7, 3.8 support

For more extensive information on these changes, check #76 and here