greenlet is a Python C-extension that adds lightweight coroutines to the language, useful for cooperative multitasking.
greenlet is a Python C-extension that adds lightweight coroutines to the language, useful for cooperative multitasking.
Questions tagged [greenlets]
150 questions
6
votes
3 answers
I'm looking for gevent for Python 2.7 for windows
However gevent depends upon greenlet and the .msi version I found fails to install and the egg for 2.6 refuses to install.
The msi version fails as follows.
C:\Windows\system32>easy_install greenlet
install_dir…
Ian
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6
votes
3 answers
Downloading images with gevent
My task is to download 1M+ images from a given list of urls. What is the recommended way to do so?
After having read Greenlet Vs. Threads I looked into gevent, but I fail to get it reliably to run. I played around with a test set of 100 urls and…
Framester
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6
votes
0 answers
Intel Galileo - greenlet.h:8:20: fatal error: Python.h: No such file or directory
I'm running Linux dev-tools image (link at the end) on my intel galileo. I tried to install greenlet but I got an error stating python.h no such file.
root@clanton:/media/realroot/greenlet-0.4.2# python setup.py install
running install
running…
Harsh
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6
votes
1 answer
Python: Getting value from Gevent Greenlet
I'm learning Gevent, but can't get the value returned by the function called in a greenlet. The following code:
import gevent.monkey
gevent.monkey.patch_socket()
import gevent
from gevent import Greenlet
import urllib2
import simplejson as…
tldr
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5
votes
0 answers
Gunicorn config.py file with 2 workers and 2 threads handles just 2 requests in parallel
There is no answer in the original github issue:
https://github.com/tiangolo/meinheld-gunicorn-flask-docker/issues/48
In the simple setup below I am expecting the gunicorn to process at least 4 requests in parallel, but I get just 2.
In the…
BezBran
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5
votes
1 answer
Forking Greenlets
Perhaps I'm missing something obvious (and it is a Friday), but is there a way to do the equivalent of an os.fork() on a greenlet? I'm not necessarily looking to fork the process, I'm looking to take the greenlet and run one set of code, then…
mattbasta
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5
votes
0 answers
This event is already used by another greenlet
I use gunicorn 17.5 with worker_class="gevent", workers=3, that I start with gunicorn -c config.py my:app. I just noticed the following error in my logs
2014-04-01 04:48:49 [4297] [ERROR] Error handling request
Traceback (most recent call last):
…
user3483856
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5
votes
1 answer
Does gunicorn + gevent monkey patch threadlocals to be greenlet-locals automatically?
When running gunicorn in gevent mode, are the monkey patches (particularly those for threadlocals) described here, which make threadlocals greenlet-locals, already applied automatically?
(I am running django and currently use threadlocals for a…
B Robster
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5
votes
1 answer
Python and truly concurrent threads
I've been reading for hours now and I can completely figure out how python multi threading is faster than a single thread.
The question really stems from GIL. If there is GIL, and only one thread is really running at any single time, how can multi…
Anton
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4
votes
2 answers
Gevent Pywsgi Server - Multiprocessing?
The following code (taken from here: https://bitbucket.org/denis/gevent/src/6c710e8ae58b/examples/wsgiserver_ssl.py) implements an extremely fast greenlet powered wsgi webserver:
#!/usr/bin/python
"""Secure WSGI server example based on…
pokstad
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4
votes
1 answer
Python: Prioritizing tasks and Running asynchronous tasks without a lock
Right now I'm using Gevent, and I wanted to ask two questions:
Is there a way to execute specific tasks that will never execute asynchronously (instead of using a Lock in each of these tasks)
Is there's a way to prioritize spawned tasks in Gevent?…
cydan
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4
votes
1 answer
How can I use mock for testing inside greenlet?
I use bottle & gevent for my python (2.7.6) application.
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from gevent import spawn, monkey
from bottle import Bottle
from .settings import MONGODB_HOST, MONGODB_PORT,…
Ruslan Ksalov
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4
votes
0 answers
How to use grequests in flask?
I am experimenting with gunicorn with gevent workers and Flask. In a view function, I need to make a GET request to an url. Previously, I'm using requests library to do that. But since I want to use gevent workers, I believe I have to make it async,…
hans-t
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4
votes
0 answers
is MySQL Connector/Python greenlet safe?
I'd like to know whether the MySQL Connector/Python driver is greenlet safe. Their site [1] doesn't mention anything about greenlets. Just that it's thread safe.
Some searching leads me to gevent-MySQL (dead) which leads me to amysql (deprecated)…
user3084826
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4
votes
3 answers
Passing a multiprocessing queue/dictionary/etc.. to green threads
Is it safe to pass a multiprocessing object (queue, dictionary, etc...) to multiple gevent threads? Since they're not actually running concurrently, I don't think there's a problem. However, I know that gevent isn't supposed to be specifically…
Dustin Oprea
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