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- Metadata-Version: 2.4
- Name: greenlet
- Version: 3.3.2
- Summary: Lightweight in-process concurrent programming
- Author-email: Alexey Borzenkov <snaury@gmail.com>
- Maintainer-email: Jason Madden <jason@seecoresoftware.com>
- License-Expression: MIT AND PSF-2.0
- Project-URL: Homepage, https://greenlet.readthedocs.io
- Project-URL: Documentation, https://greenlet.readthedocs.io
- Project-URL: Repository, https://github.com/python-greenlet/greenlet
- Project-URL: Issues, https://github.com/python-greenlet/greenlet/issues
- Project-URL: Changelog, https://greenlet.readthedocs.io/en/latest/changes.html
- Keywords: greenlet,coroutine,concurrency,threads,cooperative
- Classifier: Development Status :: 5 - Production/Stable
- Classifier: Intended Audience :: Developers
- Classifier: Natural Language :: English
- Classifier: Programming Language :: C
- Classifier: Programming Language :: Python
- Classifier: Programming Language :: Python :: 3
- Classifier: Programming Language :: Python :: 3.10
- Classifier: Programming Language :: Python :: 3.11
- Classifier: Programming Language :: Python :: 3.12
- Classifier: Programming Language :: Python :: 3.13
- Classifier: Programming Language :: Python :: 3.14
- Classifier: Operating System :: OS Independent
- Classifier: Topic :: Software Development :: Libraries :: Python Modules
- Requires-Python: >=3.10
- Description-Content-Type: text/x-rst
- License-File: LICENSE
- License-File: LICENSE.PSF
- Provides-Extra: docs
- Requires-Dist: Sphinx; extra == "docs"
- Requires-Dist: furo; extra == "docs"
- Provides-Extra: test
- Requires-Dist: objgraph; extra == "test"
- Requires-Dist: psutil; extra == "test"
- Requires-Dist: setuptools; extra == "test"
- Dynamic: license-file
- .. This file is included into docs/history.rst
- Greenlets are lightweight coroutines for in-process concurrent
- programming.
- The "greenlet" package is a spin-off of `Stackless`_, a version of
- CPython that supports micro-threads called "tasklets". Tasklets run
- pseudo-concurrently (typically in a single or a few OS-level threads)
- and are synchronized with data exchanges on "channels".
- A "greenlet", on the other hand, is a still more primitive notion of
- micro-thread with no implicit scheduling; coroutines, in other words.
- This is useful when you want to control exactly when your code runs.
- You can build custom scheduled micro-threads on top of greenlet;
- however, it seems that greenlets are useful on their own as a way to
- make advanced control flow structures. For example, we can recreate
- generators; the difference with Python's own generators is that our
- generators can call nested functions and the nested functions can
- yield values too. (Additionally, you don't need a "yield" keyword. See
- the example in `test_generator.py
- <https://github.com/python-greenlet/greenlet/blob/adca19bf1f287b3395896a8f41f3f4fd1797fdc7/src/greenlet/tests/test_generator.py#L1>`_).
- Greenlets are provided as a C extension module for the regular unmodified
- interpreter.
- .. _`Stackless`: http://www.stackless.com
- Who is using Greenlet?
- ======================
- There are several libraries that use Greenlet as a more flexible
- alternative to Python's built in coroutine support:
- - `Concurrence`_
- - `Eventlet`_
- - `Gevent`_
- .. _Concurrence: http://opensource.hyves.org/concurrence/
- .. _Eventlet: http://eventlet.net/
- .. _Gevent: http://www.gevent.org/
- Getting Greenlet
- ================
- The easiest way to get Greenlet is to install it with pip::
- pip install greenlet
- Source code archives and binary distributions are available on the
- python package index at https://pypi.org/project/greenlet
- The source code repository is hosted on github:
- https://github.com/python-greenlet/greenlet
- Documentation is available on readthedocs.org:
- https://greenlet.readthedocs.io
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