gevent

Coroutine-based network library

Project description

gevent

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gevent is a coroutine -based Python networking library that uses greenlet to provide a high-level synchronous API on top of the libev or libuv event loop.

Features include:

Fast event loop based on libev or libuv.
Lightweight execution units based on greenlets.
API that re-uses concepts from the Python standard library (for examples there are events and queues).
Cooperative sockets with SSL support
Cooperative DNS queries performed through a threadpool, dnspython, or c-ares.
Monkey patching utility to get 3rd party modules to become cooperative
TCP/UDP/HTTP servers
Subprocess support (through gevent.subprocess)
Thread pools

gevent is inspired by eventlet but features a more consistent API, simpler implementation and better performance. Read why others use gevent and check out the list of the open source projects based on gevent.

gevent was written by Denis Bilenko.

Since version 1.1, gevent is maintained by Jason Madden for NextThought with help from the contributors and is licensed under the MIT license.

See what’s new in the latest major release.

Check out the detailed changelog for this version.

Read the documentation online at http://www.gevent.org.

Post feedback and issues on the bug tracker, mailing list, blog and twitter (@gevent).

Installation and Requirements

Supported Platforms

gevent 1.5 runs on Python 2.7.9 and up, and Python 3.5, 3.6, 3.7 and 3.8. gevent requires the greenlet library and will install the cffi library by default on Windows. The cffi library will become the default on all platforms in a future release of gevent.

gevent 1.5 also runs on PyPy 7.0 or above. On PyPy, there are no external dependencies.

gevent is tested on Windows, macOS, and Linux, and should run on most other Unix-like operating systems (e.g., FreeBSD, Solaris, etc.)

Note

On Windows using the deprecated libev backend, gevent is limited to a maximum of 1024 open sockets due to limitations in libev. This limitation should not exist with the default libuv backend.

Older Versions of Python

Users of older versions of Python 2 or Python 3 may install an older version of gevent. Note that these versions are generally not supported.

Python Version	Gevent Version
2.5	1.0.x
2.6	1.1.x
<= 2.7.8	1.2.x
3.3	1.2.x
3.4.0 - 3.4.2	1.3.x
3.4.3	1.4.x

Installation

Note

This section is about installing released versions of gevent as distributed on the Python Package Index. For building gevent from source, including customizing the build and embedded libraries, see Installing From Source.

gevent and greenlet can both be installed with pip, e.g., pip install gevent. Installation using buildout is also supported.

On Windows, macOS, and Linux, both gevent and greenlet are distributed as binary wheels.

Tip

You need Pip 8.0 or later, or buildout 2.10.0 to install the binary wheels on Windows or macOS. On Linux, you’ll need pip 19 to install the manylinux2010 wheels.

Installing From Source

If you are unable to use the binary wheels (for platforms where no pre-built wheels are available or if wheel installation is disabled), you can build gevent from source. A normal pip install will fall back to doing this if no binary wheel is available. See Installing From Source for more, including common installation issues.

Extra Dependencies

gevent has no runtime dependencies outside the standard library, greenlet, and (on some platforms) cffi. However, there are a number of additional libraries that extend gevent’s functionality and will be used if they are available. All of these may be installed using setuptools extras, as named below, e.g., pip install gevent[events].

events: Configurable event support using zope.event is highly recommended for configurable event support.
dnspython: Enables the new pure-Python resolver, backed by dnspython. On Python 2, this also includes idna. They can be installed with the dnspython extra.
monitor: Enhancements to gevent’s self-monitoring capabilities. This includes the psutil library which is needed to monitor memory usage. (Note that this may not build on all platforms.)
recommended: A shortcut for installing suggested extras together.
test: Everything needed to run the complete gevent test suite.

Project details

Release history Release notifications | RSS feed

21.1.2

Jan 20, 2021

21.1.1

Jan 18, 2021

21.1.0

Jan 15, 2021

20.12.1

Dec 27, 2020

20.12.0

Dec 22, 2020

20.9.0

Sep 22, 2020

20.6.2

Jun 16, 2020

20.6.1

Jun 10, 2020

20.6.0

Jun 6, 2020

20.5.2

May 28, 2020

20.5.1

May 26, 2020

20.5.0

May 1, 2020

20.4.0

Apr 22, 2020

This version

1.5.0

Apr 10, 2020

1.5a4 pre-release

Mar 23, 2020

1.5a3 pre-release

Jan 1, 2020

1.5a2 pre-release

Oct 22, 2019

1.5a1 pre-release

May 2, 2019

1.4.0

Jan 4, 2019

1.3.7

Oct 12, 2018

1.3.6

Aug 17, 2018

1.3.5

Jul 16, 2018

1.3.4

Jun 20, 2018

1.3.3

Jun 8, 2018

1.3.2.post0

May 30, 2018

1.3.2

May 29, 2018

1.3.1

May 18, 2018

1.3.0

May 11, 2018

1.3b2 pre-release

May 3, 2018

1.3b1 pre-release

Apr 13, 2018

1.3a2 pre-release

Mar 6, 2018

1.3a1 pre-release

Jan 27, 2018

1.2.2

Jun 5, 2017

1.2.1

Jan 12, 2017

1.2.0

Dec 23, 2016

1.2a2 pre-release

Dec 9, 2016

1.2a1 pre-release

Oct 27, 2016

1.1.2

Jul 21, 2016

1.1.1

Apr 4, 2016

1.1.0

Mar 5, 2016

1.1rc5 pre-release

Feb 24, 2016

1.1rc4 pre-release

Feb 16, 2016

1.1rc3 pre-release

Jan 4, 2016

1.1rc2 pre-release

Dec 11, 2015

1.1rc1 pre-release

Nov 14, 2015

1.1b6 pre-release

Oct 17, 2015

1.1b5 pre-release

Sep 18, 2015

1.1b4 pre-release

Sep 4, 2015

1.1b3 pre-release

Aug 16, 2015

1.1b2 pre-release

Aug 5, 2015

1.1b1 pre-release

Jul 17, 2015

1.1a2 pre-release

Jul 8, 2015

1.1a1 pre-release

Jun 29, 2015

1.0.2

May 23, 2015

1.0.1

Apr 30, 2014

1.0

Nov 26, 2013

0.13.8

Sep 6, 2012

0.13.7

Apr 11, 2012

0.13.6

May 2, 2011

0.13.5

Apr 21, 2011

0.13.4

Apr 11, 2011

0.13.3

Feb 7, 2011

0.13.2

Jan 28, 2011

0.13.1

Sep 23, 2010

0.13.0

Jul 14, 2010

0.12.2

Mar 2, 2010

0.12.1

Feb 26, 2010

0.12.0

Feb 5, 2010

0.11.2

Dec 10, 2009

0.11.1

Nov 15, 2009

0.11.0

Oct 9, 2009

0.10.0

Aug 26, 2009

0.9.3

Aug 3, 2009

0.9.2

Jul 20, 2009

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