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========= aiosignal ========= .. image:: https://github.com/aio-libs/aiosignal/workflows/CI/badge.svg :target: https://github.com/aio-libs/aiosignal/actions?query=workflow%3ACI :alt: GitHub status for master branch .. image:: https://codecov.io/gh/aio-libs/aiosignal/branch/master/graph/badge.svg :target: https://codecov.io/gh/aio-libs/aiosignal :alt: codecov.io status for master branch .. image:: https://badge.fury.io/py/aiosignal.svg :target: https://pypi.org/project/aiosignal :alt: Latest PyPI package version .. image:: https://readthedocs.org/projects/aiosignal/badge/?version=latest :target: https://aiosignal.readthedocs.io/ :alt: Latest Read The Docs .. image:: https://img.shields.io/discourse/topics?server=https%3A%2F%2Faio-libs.discourse.group%2F :target: https://aio-libs.discourse.group/ :alt: Discourse group for io-libs .. image:: https://badges.gitter.im/Join%20Chat.svg :target: https://gitter.im/aio-libs/Lobby :alt: Chat on Gitter Introduction ============ A project to manage callbacks in `asyncio` projects. ``Signal`` is a list of registered asynchronous callbacks. The signal's life-cycle has two stages: after creation its content could be filled by using standard list operations: ``sig.append()`` etc. After you call ``sig.freeze()`` the signal is *frozen*: adding, removing and dropping callbacks is forbidden. The only available operation is calling the previously registered callbacks by using ``await sig.send(data)``. For concrete usage examples see the `Signals <https://docs.aiohttp.org/en/stable/web_advanced.html#aiohttp-web-signals> section of the `Web Server Advanced <https://docs.aiohttp.org/en/stable/web_advanced.html>` chapter of the `aiohttp documentation`_. Installation ------------ :: $ pip install aiosignal The library requires Python 3.6 or newer. Documentation ============= https://aiosignal.readthedocs.io/ Communication channels ====================== *aio-libs* google group: https://groups.google.com/forum/#!forum/aio-libs Feel free to post your questions and ideas here. *gitter chat* https://gitter.im/aio-libs/Lobby Requirements ============ - Python >= 3.6 - frozenlist >= 1.0.0 License ======= ``aiosignal`` is offered under the Apache 2 license. Source code =========== The project is hosted on GitHub_ Please file an issue in the `bug tracker <https://github.com/aio-libs/aiosignal/issues>`_ if you have found a bug or have some suggestions to improve the library. .. _GitHub: https://github.com/aio-libs/aiosignal .. _aiohttp documentation: https://docs.aiohttp.org/