async-timeout
=============

asyncio-compatible timeout context manager.


Usage example
-------------


The context manager is useful in cases when you want to apply timeout
logic around block of code or in cases when ``asyncio.wait_for()`` is
not suitable. Also it's much faster than ``asyncio.wait_for()``
because ``timeout`` doesn't create a new task.

The ``timeout(timeout, *, loop=None)`` call returns a context manager
that cancels a block on *timeout* expiring::

       with timeout(1.5):
           yield from inner()

1. If ``inner()`` is executed faster than in ``1.5`` seconds nothing
   happens.
2. Otherwise ``inner()`` is cancelled internally by sending
   ``asyncio.CancelledError`` into but ``asyncio.TimeoutError`` is
   raised outside of context manager scope.

*timeout* parameter could be ``None`` for skipping timeout functionality.

Installation
------------

::

   $ pip install async-timeout

The library is Python 3 only!



Authors and License
-------------------

The module is written by Andrew Svetlov.

It's *Apache 2* licensed and freely available.


CHANGES
=======

1.2.1 (2017-05-02)
------------------

* Support unpublished event loop's "current_task" api.


1.2.0 (2017-03-11)
------------------

* Extra check on context manager exit

* 0 is no-op timeout


1.1.0 (2016-10-20)
------------------

* Rename to `async-timeout`

1.0.0 (2016-09-09)
------------------

* The first release.