Gruvi: Async IO for Python, Simplified
Improved ergonomics for Python programmers wanting to use asynchronous IO.
Gruvi is an asynchronous IO library for Python. It focuses on the following desirable properties:
Simple. Async IO code should look just like normal code, with simple, sequential control flow and regular functions.
Efficient. An IO library should have a very low memory and CPU overhead, so that it can scale to small systems or to many concurrent connections.
Powerful. Common protocols like SSL/TLS and HTTP should be part of every IO library.
Gruvi uses libuv_ (via pyuv_) as the underlying high-performance event-based I/O layer, and coroutines based on fibers_ to create a traditional sequential programming model on top of the libuv_ completion/callback model.
Gruvi is similar in concept existing async IO frameworks like asyncio_, gevent_, and eventlet_. For a comparison, see Rationale_.
Gruvi has the following features:
asynchronous SSL_ support in the Python standard library came from Gruvi before it was included into the stdlib.
An simple echo server, using a StreamServer_::
def echo_handler(stream, transport, protocol): while True: buf = stream.read1() if not buf: break stream.write(buf)
server = gruvi.StreamServer(echo_handler) server.listen(('localhost', 7777)) server.run()
You need Python 2.7 or 3.3+.
The following operating systems are currently supported:
Development install in a virtualenv::
$ git clone https://github.com/geertj/gruvi $ cd gruvi $ pip install -r requirements.txt $ python setup.py build $ python setup.py install
To run the test suite::
$ python runtests.py unit
For other installation options, see the Installation_ section in the manual.
The documentation is available on readthedocs_.
Gruvi is free software, provided under the MIT license.
Feel free to contact the author at [email protected]. You can also submit tickets or suggestions for improvements on Github_.
.. _libuv: https://github.com/libuv/libuv .. _pyuv: http://pyuv.readthedocs.org/en/latest .. _fibers: http://python-fibers.readthedocs.org/en/latest .. _asyncio: http://docs.python.org/3.4/library/asyncio.html .. _gevent: http://gevent.org/ .. _eventlet: http://eventlet.net/ .. _Rationale: http://gruvi.readthedocs.org/en/latest/rationale.html .. _asynchronous SSL: https://docs.python.org/3/library/ssl.html#ssl.SSLObject .. _StreamServer: http://gruvi.readthedocs.org/en/latest/streams.html .. _Installation: http://gruvi.readthedocs.org/en/latest/install.html .. _readthedocs: https://gruvi.readthedocs.org/ .. _Github: https://github.com/geertj/gruvi