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Metadata-Version: 2.1 Name: greenlet Version: 3.1.1 Summary: Lightweight in-process concurrent programming Home-page: https://greenlet.readthedocs.io/ Author: Alexey Borzenkov Author-email: snaury@gmail.com Maintainer: Jason Madden Maintainer-email: jason@seecoresoftware.com License: MIT License Project-URL: Bug Tracker, https://github.com/python-greenlet/greenlet/issues Project-URL: Source Code, https://github.com/python-greenlet/greenlet/ Project-URL: Documentation, https://greenlet.readthedocs.io/ Keywords: greenlet coroutine concurrency threads cooperative Platform: any Classifier: Development Status :: 5 - Production/Stable Classifier: Intended Audience :: Developers Classifier: License :: OSI Approved :: MIT License Classifier: Natural Language :: English Classifier: Programming Language :: C Classifier: Programming Language :: Python Classifier: Programming Language :: Python :: 3 Classifier: Programming Language :: Python :: 3 :: Only Classifier: Programming Language :: Python :: 3.7 Classifier: Programming Language :: Python :: 3.8 Classifier: Programming Language :: Python :: 3.9 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: Operating System :: OS Independent Classifier: Topic :: Software Development :: Libraries :: Python Modules Requires-Python: >=3.7 Description-Content-Type: text/x-rst License-File: LICENSE License-File: LICENSE.PSF License-File: AUTHORS 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' .. 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