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117 lines
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117 lines
4.0 KiB
Plaintext
Metadata-Version: 2.4
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Name: greenlet
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Version: 3.2.2
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Summary: Lightweight in-process concurrent programming
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Home-page: https://greenlet.readthedocs.io/
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Author: Alexey Borzenkov
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Author-email: snaury@gmail.com
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Maintainer: Jason Madden
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Maintainer-email: jason@seecoresoftware.com
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License: MIT AND Python-2.0
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Project-URL: Bug Tracker, https://github.com/python-greenlet/greenlet/issues
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Project-URL: Source Code, https://github.com/python-greenlet/greenlet/
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Project-URL: Documentation, https://greenlet.readthedocs.io/
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Project-URL: Changes, https://greenlet.readthedocs.io/en/latest/changes.html
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Keywords: greenlet coroutine concurrency threads cooperative
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Platform: any
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Classifier: Development Status :: 5 - Production/Stable
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Classifier: Intended Audience :: Developers
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Classifier: Natural Language :: English
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Classifier: Programming Language :: C
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Classifier: Programming Language :: Python
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Classifier: Programming Language :: Python :: 3
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Classifier: Programming Language :: Python :: 3 :: Only
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Classifier: Programming Language :: Python :: 3.9
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Classifier: Programming Language :: Python :: 3.10
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Classifier: Programming Language :: Python :: 3.11
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Classifier: Programming Language :: Python :: 3.12
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Classifier: Programming Language :: Python :: 3.13
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Classifier: Operating System :: OS Independent
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Classifier: Topic :: Software Development :: Libraries :: Python Modules
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Requires-Python: >=3.9
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Description-Content-Type: text/x-rst
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License-File: LICENSE
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License-File: LICENSE.PSF
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Provides-Extra: docs
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Requires-Dist: Sphinx; extra == "docs"
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Requires-Dist: furo; extra == "docs"
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Provides-Extra: test
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Requires-Dist: objgraph; extra == "test"
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Requires-Dist: psutil; extra == "test"
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.. This file is included into docs/history.rst
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Greenlets are lightweight coroutines for in-process concurrent
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programming.
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The "greenlet" package is a spin-off of `Stackless`_, a version of
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CPython that supports micro-threads called "tasklets". Tasklets run
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pseudo-concurrently (typically in a single or a few OS-level threads)
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and are synchronized with data exchanges on "channels".
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A "greenlet", on the other hand, is a still more primitive notion of
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micro-thread with no implicit scheduling; coroutines, in other words.
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This is useful when you want to control exactly when your code runs.
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You can build custom scheduled micro-threads on top of greenlet;
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however, it seems that greenlets are useful on their own as a way to
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make advanced control flow structures. For example, we can recreate
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generators; the difference with Python's own generators is that our
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generators can call nested functions and the nested functions can
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yield values too. (Additionally, you don't need a "yield" keyword. See
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the example in `test_generator.py
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<https://github.com/python-greenlet/greenlet/blob/adca19bf1f287b3395896a8f41f3f4fd1797fdc7/src/greenlet/tests/test_generator.py#L1>`_).
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Greenlets are provided as a C extension module for the regular unmodified
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interpreter.
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.. _`Stackless`: http://www.stackless.com
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Who is using Greenlet?
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======================
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There are several libraries that use Greenlet as a more flexible
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alternative to Python's built in coroutine support:
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- `Concurrence`_
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- `Eventlet`_
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- `Gevent`_
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.. _Concurrence: http://opensource.hyves.org/concurrence/
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.. _Eventlet: http://eventlet.net/
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.. _Gevent: http://www.gevent.org/
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Getting Greenlet
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================
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The easiest way to get Greenlet is to install it with pip::
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pip install greenlet
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Source code archives and binary distributions are available on the
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python package index at https://pypi.org/project/greenlet
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The source code repository is hosted on github:
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https://github.com/python-greenlet/greenlet
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Documentation is available on readthedocs.org:
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https://greenlet.readthedocs.io
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