New usages of eventlet are now heavily discouraged! Please read the following.
Eventlet was created almost 18 years ago, at a time where async features were absent from the CPython stdlib. With time eventlet evolved and CPython too, but since several years the maintenance activity of eventlet dicreased leading to a growing gap between eventlet and the CPython implementation.
This gap is now too high and can lead you to unexpected side effects and bugs in your applications.
Eventlet now follows a new maintenance policy. Only maintenance for stability and bug fixing will be provided. No new features will be accepted, except those related to the asyncio migration. Usages in new projects are discouraged. Our goal is to plan the retirement of eventlet and to give you ways to move away from eventlet.
If you are looking for a library to manage async network programming, and if you do not yet use eventlet, then, we encourage you to use asyncio, which is the official async library of the CPython stdlib.
If you already use eventlet, we hope to enable migration to asyncio for some use cases; see Migrating off of Eventlet. Only new features related to the migration solution will be accepted.
If you have questions concerning maintenance goals or concerning the migration do not hesitate to open a new issue, we will be happy to answer them.
Code talks! This is a simple web crawler that fetches a bunch of urls concurrently:
urls = [
from eventlet.green.urllib.request import urlopen
pool = eventlet.GreenPool()
for body in pool.imap(fetch, urls):
print("got body", len(body))
Supported Python versions¶
Currently supporting CPython 3.7+.
- Migrating off of Eventlet
- Basic Usage
- Primary API
- Design Patterns
- Greening The World
- Using SSL With Eventlet
- Understanding Eventlet Hubs
- Testing Eventlet
- Environment Variables
- Module Reference
backdoor– Python interactive interpreter within a running process
corolocal– Coroutine local storage
dagpool– Dependency-Driven Greenthreads
- Module Contents
debug– Debugging tools for Eventlet
db_pool– DBAPI 2 database connection pooling
event– Cross-greenthread primitive
greenpool– Green Thread Pools
greenthread– Green Thread Implementation
pools- Generic pools of resources
queue– Queue class
semaphore– Semaphore classes
timeout– Universal Timeouts
websocket– Websocket Server
wsgi– WSGI server
eventlet.green.zmq– ØMQ support
Eventlet is made available under the terms of the open source MIT license