castfit 0.1.3 #

Now with a non-exhaustive is_subtype function

castfit 0.1.3 is available. The biggest thing I did was implement is_subtype which is a forced me to learn about invariant, covariant, and contravariant types.

To install castfit:

# modern (recommended)
uv add castfit

# classic
python -m pip install castfit

Release Notes 0.1.3 - 2025-11-27T03:12:11Z #

Changed

#33 PyPI publishing to support newer uv build metadata
#40 PyPI publishing to use uv publish instead of pypa/gh-action-pypi-publish

Added

#23 ability to type check Callable via is_subtype
#34 support for property fields on classes
#35 __name__ to TypeInfo if present
#36 support for default values in dataclasses.Field
#37 support for function definitions in classes

Removed

#40 support for python 3.9

Security

#40 We are trying out uv publish instead of pypa/gh-action-pypi-publish.

2025-11-27 # release, castfit, LTS