Utilities for working with inspect.Signature objects

sigtools is a Python package that enhances introspection capabilities for determining function signatures, especially when decorators modify them. It provides utilities for boosting callable signature introspection, backports keyword-only parameters for older Python versions (though current versions are Python 3+), and tools for combining functions while preserving correct signatures. The current version is 4.0.1, with releases occurring periodically to maintain compatibility and add features.