Description:
geventlbh 21.1.3.dev0
gevent
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 issues on the bug tracker, discuss and ask open ended
questions on the mailing list, and find announcements and
information on the blog and twitter (@gevent).
Installation and Requirements
Note
If you are reading this document on the Python Package Index
(PyPI, https://pypi.org/), it is specific to the version of gevent that
you are viewing. If you are viewing this document on gevent.org, it
refers to the current state of gevent in source control (git
master).
Supported Platforms
This version of gevent 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.
This version of gevent 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
Windows is supported as a tier 2, “best effort,” platform. It is
suitable for development, but not recommended for production.
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.
Tip
Binary wheels cannot be installed on non-manylinux2010 compatible
Linux systems, such as those that use musl, including Alpine Linux. Those systems must install from source.
Tip
Beginning with gevent 20.12.0, 64-bit ARM binaries are distributed
on PyPI for aarch64 manylinux2014 compatible systems. Installing these
needs a very recent version of pip. These wheels do not
contain the c-ares resolver, are not tested, and are built with
very low levels of optimizations. Serious production users of
gevent on 64-bit ARM systems are encouraged to build their own
binary 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
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
In versions of gevent up to and including 20.5.0, this provided configurable
event support using zope.event and was highly
recommended.
In versions after that, this extra is empty and does nothing. It
will be removed in gevent 21.0.
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. This includes
the non-test extras defined here, plus:
backports.socketpair on Python
2/Windows (beginning with release 20.6.0);
selectors2 on Python 2 (beginning with release 20.6.0).
test
Everything needed to run the complete gevent test suite.
License
For personal and professional use. You cannot resell or redistribute these repositories in their original state.
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