# sigtools

> Utilities for working with inspect.Signature objects.

- **URL**: https://www.freshcrate.ai/projects/sigtools
- **Author**: Yann Kaiser
- **Category**: Developer Tools
- **Latest version**: `4.0.1` (2026-04-21)
- **License**: MIT
- **Homepage**: https://sigtools.readthedocs.io/
- **Language**: Python
- **Registry**: pypi (`sigtools`)
- **Tags**: `introspection`, `pypi`, `signature`

## Description

``sigtools``: utilities to manipulate callable objects' signatures
==================================================================

The ``sigtools`` python library provides:

* ``sigtools.signature`` to resolve function signatures,
  taking into account parameters added or removed by decorators.
* Decorators to specify keyword-only parameters, annotations and
  positional-only parameters, even on python2: ``sigtools.modifiers``
* Decorators to specify how ``*args, **kwargs`` are handled, in a way
  that can be introspected: ``sigtools.specifiers``
* Function combination routines that preserve signatures: ``sigtools.wrappers``
* Functions to manipulate signature objects likewise: ``sigtools.signatures``

The documentation can be found at Read The Docs:
https://sigtools.readthedocs.org

Installing
----------

Within a `virtualenv
<https://virtualenv.readthedocs.org/en/latest/virtualenv.html>`_::

    $ pip install sigtools

Or for a user-wide install::

    $ pip install --user sigtools

## Recent releases

| Version | Date | Urgency | Changes |
| --- | --- | --- | --- |
| `4.0.1` | 2026-04-21 | Low | Imported from PyPI (4.0.1) |

## Citation

- HTML: https://www.freshcrate.ai/projects/sigtools
- Markdown: https://www.freshcrate.ai/projects/sigtools.md
- Dependencies JSON: https://www.freshcrate.ai/api/projects/sigtools/deps

_Generated by freshcrate.ai. Indexes pypi releases for AI-agent ecosystem packages._