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Metadata-Version: 2.1
Name: async-timeout
Version: 3.0.1
Summary: Timeout context manager for asyncio programs
Home-page: https://github.com/aio-libs/async_timeout/
Author: Andrew Svetlov
Author-email: andrew.svetlov@gmail.com
License: Apache 2
Platform: UNKNOWN
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Intended Audience :: Developers
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Topic :: Internet :: WWW/HTTP
Classifier: Framework :: AsyncIO
Requires-Python: >=3.5.3
async-timeout
=============
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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::
async with timeout(1.5):
await 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.
Context manager has ``.expired`` property for check if timeout happens
exactly in context manager::
async with timeout(1.5) as cm:
await inner()
print(cm.expired)
The property is ``True`` if ``inner()`` execution is cancelled by
timeout context manager.
If ``inner()`` call explicitly raises ``TimeoutError`` ``cm.expired``
is ``False``.
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
=======
3.0.1 (2018-10-09)
------------------
- More aggressive typing (#48)
3.0.0 (2018-05-05)
------------------
- Drop Python 3.4, the minimal supported version is Python 3.5.3
- Provide type annotations
2.0.1 (2018-03-13)
------------------
* Fix ``PendingDeprecationWarning`` on Python 3.7 (#33)
2.0.0 (2017-10-09)
------------------
* Changed `timeout <= 0` behaviour
* Backward incompatibility change, prior this version `0` was
shortcut for `None`
* when timeout <= 0 `TimeoutError` raised faster
1.4.0 (2017-09-09)
------------------
* Implement `remaining` property (#20)
* If timeout is not started yet or started unconstrained:
`remaining` is `None`
* If timeout is expired: `remaining` is `0.0`
* All others: roughly amount of time before `TimeoutError` is triggered
1.3.0 (2017-08-23)
------------------
* Don't suppress nested exception on timeout. Exception context points
on cancelled line with suspended `await` (#13)
* Introduce `.timeout` property (#16)
* Add methods for using as async context manager (#9)
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.