Lightweight in-process concurrent programming
Project description
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 tests/test_generator.py.
Greenlets are provided as a C extension module for the regular unmodified interpreter.
Greenlets are lightweight coroutines for in-process concurrent programming.
Who is using Greenlet?
There are several libraries that use Greenlet as a more flexible alternative to Python’s built in coroutine support:
Getting Greenlet
The easiest way to get Greenlet is to install it with pip or easy_install:
pip install greenlet easy_install greenlet
Source code archives and windows installers are available on the python package index at http://pypi.python.org/pypi/greenlet
The source code repository is hosted on github: https://github.com/python-greenlet/greenlet
The master branch - i.e. the development version - can be installed directly by running one of the following:
pip install greenlet==dev easy_install greenlet==dev
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
Built Distributions
Hashes for greenlet-0.4.1.win-amd64-py3.3.exe
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | 54d2c121a02a97d2c9c96bd838bb59479b0fa85918e2be6f0243cf11434c77ca |
|
| MD5 | bdee3d765b7c25e1cdff0277a9290cb0 |
|
| BLAKE2b-256 | 5a55952b965e559914f1166f4934084d41945a8e62a109bc33ab032c81c44056 |
Hashes for greenlet-0.4.1.win-amd64-py2.7.exe
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | 4d5387ea43d77dcd73fa491848f315120acb4b0a6c0162394159a9c236d76c59 |
|
| MD5 | 45e9f53cbcb6db5650d3e486aca5641a |
|
| BLAKE2b-256 | 0a89c8ff5eb44845a096f35627b6de6114f615fa8787a4e28a22bf5fcbdf42fd |
