eventlet | Concurrent networking library for Python | Networking library
kandi X-RAY | eventlet Summary
kandi X-RAY | eventlet Summary
Concurrent networking library for Python
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Top functions reviewed by kandi - BETA
- Handle a single response .
- Run the CGI command .
- Return a new HTTP Server instance .
- Monkey patch eventlets .
- Produce an UDP query .
- Put a new request .
- Return a list of normalized cookie tuples .
- Parse the request line .
- Convert a DNS query into TCP .
- Given a list of header values return a list of header values .
eventlet Key Features
eventlet Examples and Code Snippets
Lines of Code : 0License : Permissive (BSD-3-Clause)
Copy@app.route("/get-data")
async def get_data():
data = await async_db_query(...)
return jsonify(data)
Python 3.8 has a bug related to asyncio on Windows. If you encounter
something like ``ValueError: set_wakeup_fd only works in main thread``,
p $ gunicorn -k gevent 'hello:create_app()'
Starting gunicorn 20.1.0
Listening at: http://127.0.0.1:8000 (x)
Using worker: gevent
Booting worker with pid: x
$ gunicorn -k eventlet 'hello:create_app()'
Starting gunicorn 20.1.0
Listening at: http://127.0 gunicorn
waitress
mod_wsgi
uwsgi
gevent
eventlet
asgi
proxy_fix
nginx
apache-httpd import requests
from celery import shared_task
@shared_task()
def urlopen(url):
print(f'-open: {url}')
try:
response = requests.get(url)
except requests.exceptions.RequestException as exc:
print(f'-url {url} gave error: from eventlet import sleep
from eventlet.green import threading
CMD ["gunicorn", "--bind", "0.0.0.0:8000", "--workers", "1", "--worker-class", "eventlet", "app:app"]
for i in range(total+1):
json.dump(ll[i * size_of_the_split:(i + 1) * size_of_the_split], open(
json_file+"\\split50k" + str(i+1) + ".json", 'w',
encoding='utf8'), ensure_ascii=False, indent=True)
with open(os.path.join(json_file, 'test.json'), 'r',
encoding='utf-8') as f1:
ll = [json.loads(line) for line in f1.readlines()]
# The rest
import eventlet
eventlet.monkey_patch()
from flask import Flask, json, request
from twilio.twiml.messaging_response import Message, MessagingResponse
from flask_socketio import SocketIO
import tweepy
import json
PATH = '/PATH/TO/CREDENTIAFROM python:3.9.7
Community Discussions
Trending Discussions on eventlet
QUESTION
When i set my airflow on kubernetes infra i got some problem. I refered this blog. and some setting was changed for my situation. and I think everything work out but I run dag manually or scheduled. worker pod work nicely ( I think ) but web-ui always didn't change the status just running and queued... I want to know what is wrong...
here is my setting value.
Version info
...ANSWER
Answered 2022-Mar-15 at 04:01the issue is with the airflow Docker image you are using.
The ENTRYPOINT I see is a custom .sh file you have written and that decides whether to run a webserver or scheduler.
Airflow scheduler submits a pod for the tasks with args as follows
QUESTION
I have a question very similar to this one: Send data every 10 seconds via socket.io
But: My server is written in Python, the client is in JavaScript
The goal:
- Clients connect to server via socket.io
- Clients receive push messages
pingfrom server every n seconds - When a client sends a
pingmessage, the server broadcasts apongmessage
What works:
- Socket.io connection works fine
- Client
pingis received by server, answered withpong, which is again received by client - Server executes
ping_in_intervalsevery 5 seconds
What doesn't work:
- When server executes
ping_in_intervals(which triggers sending aping), thatpingis not received by any client - When
ping_in_intervalsloop is active, socket connections crash every minute or so. If the method is commented out, then socket connection stays stable.
Observations:
- The thread, that
ping_in_intervalsis running in doesn't seem to properly work together with the wsgi server thread. - The
ping_in_intervalsthread destabilizes the server thred, causes it to loose connections (which are reestablished right away, but they do drop every minute or so) - I think, that I'm doing something terribly wrong with threading. I have very little experience with threading in Python and don't know, where to look for the problem
Server:
...ANSWER
Answered 2022-Mar-16 at 08:52Found the solution at https://github.com/miguelgrinberg/python-socketio/blob/main/examples/server/wsgi/app.py#L16-L22
The thread, which pushes server messages every n seconds, shouldn't be started using threading, but instead using the start_background_task function of socketio.
Here's the working code:
QUESTION
I'm configuring a Flask-SocketIO server.
When locally connecting a socket (http://127.0.0.1:5000), it's normally working. But after deploying it into my GCP virtual machine, sockets connected over https are closed and reconnected every minute as shown below (looks like socket connection requests are timed out at this interval).
I've already tried with all async modes, including eventlet, gevent, and threading as well as gunicorn and uwsgi. Some configurations allow a 2-min timeout but no approach resolves the issue fundamentally.
How can I solve this?
...ANSWER
Answered 2022-Mar-09 at 19:00Read this topic its because of the Google loadbalancer
Br
QUESTION
I want to simply connect socket.io-client to python server, but for some reason it's keep failing. Initially I start my python server and then try to connect JavaScript as my client server after following that process what I see is JavaScript client server is keep trying to connect and failing with following error:
websocket.js:88 WebSocket connection to 'ws://localhost:5100/socket.io/?EIO=4&transport=websocket' failed:
and python server also repeating following error:
(10448) accepted ('127.0.0.1', 61471) 127.0.0.1 - - [01/Feb/2022 15:14:01] "GET /socket.io/?EIO=4&transport=websocket HTTP/1.1" 400 136 0.000000
I am using python3.10 with socketio following Document:
https://python-socketio.readthedocs.io/en/latest/.
Also tried version compatibility:
https://pypi.org/project/python-socketio/
pip3 freeze
I have tried multiple version for python-engineio and python-socketio to match my socket.io-client but no improvements.
...ANSWER
Answered 2022-Feb-01 at 22:58If you want to perform websocket, i'll recommend using WebSocket package built-in and websocket from gevent.
Here what I have done to achieve a thing similar as what you want to do :
QUESTION
I am trying to split a large JSON file. I came a cross many posts here, but they do not solve my problem.
I have JSON file format as follows where for each line, I have JSON input array for each line
...ANSWER
Answered 2021-Nov-23 at 05:54Try using json.loads(line) when reading the file:
QUESTION
I upgrade PostgreSQL from 13.3 to 13.4 and got a fatal error by pgAdmin 4. I found other similar question that try to fix the problem deleting the folder: "C:\Users\myusername\AppData\Roaming\pgadmin\sessions" and running pgAdmin as admin but nothing happen. Also i completely remove postgres and reinstall it, and i installed pgAdmin with his separate installation, but nothing happen again. This is the error:
...ANSWER
Answered 2021-Sep-11 at 18:16This is something that seem to have changed between pgAdmin4 5.1 and 5.7. I've seen this on a machine that had been connected to a WiFi mobile hotspot (but it could happen in other circumstances).
It has something to do with the way the dns library is used on Windows, so this could happen to other applications that use it in the same way.
Essentially, dns.Resolver scans the Windows registry for all network interfaces found under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\
The WiFi mobile hotspot that machine had been connected to had set a DhcpDomain key with value ".home". The dns.Resolver found this value and split it using the dot into multiple labels, one of them being empty. That caused the exception you mention: dns.name.EmptyLabel: A DNS label is empty.
This occurred even when the WiFi network was turned off: those were the last settings that had been in use and dns.Resolver didn't check whether the interface was enabled.
The latest version of pgAdmin seems to be an older version of dnspython (1.16.0), so I'm not sure whether this has been fixed in more recent versions. For now, there seems to be two options:
Delete or change the
DhcpDomainsubkey if you find it in on of the subkeys ofHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\(there might even be a way to force that value through the Control Panel).Connect to a different network that doesn't set this value.
QUESTION
I am trying to deplow a django project to heroku but i am getting this error.
ERROR: Command errored out with exit status 1: /app/.heroku/python/bin/python /app/.heroku/python/lib/python3.8/site-packages/pip/_vendor/pep517/_in_process.py prepare_metadata_for_build_wheel /tmp/tmp5mrz1adn Check the logs for full command output. ! Push rejected, failed to compile Python app. ! Push failed
This is the entire log
...ANSWER
Answered 2021-Oct-29 at 11:41After carefully reading log file, here's what I recommend to do for clean deploy.
While venv is activated and you're in project directory (where manage.py live), do the following:
- Open requirements.txt
- Delete unneeded modules from requirements.txt
- Uninstall unneeded modules with
pip uninstall module - Now run
pip freeze requirements.txt - Deactivate venv
- Then add
requirements.txtto source controlgit add -A - Commit your changes
git commit -m "deleted unneeded modules" - If you have existed Heroku app, connect to it with
heroku git:remote -a myapp, else pass this step - Deploy,
git push heroku master
If you are unsure which modules your project need and I can't determin exactly the project's requirements but if you have basic project, you only need 3 modules which are Django, psycopg2-binary, gunicorn, so do the following for clean deploy:
- Delete venv
- Outside project directory, create new one
- Activate venv
- Install the modules you need, probably
Django,psycopg2-binary,gunicorn - Now run
pip freeze requirements.txt - Deactivate venv
- Then add
requirements.txtto source controlgit add -A - Commit your changes
git commit -m "deleted unneeded modules" - If you have existed Heroku app, connect to it with
heroku git:remote -a myapp, else pass this step - Deploy,
git push heroku master
QUESTION
While running Flask on my local server everything was fine, but after moving to Heroku I started getting "WebSocket is closed before the connection is established." In my localserver websocket is connected once, but on heroku it keeps connecting to the websocket.
Heroku Logs
...ANSWER
Answered 2021-Oct-26 at 15:32Do you see the discrepancy? You are running Gunicorn with the gevent-websocket worker, but Flask-SocketIO thinks it is configured to use eventlet:
QUESTION
I'm testing a flask-socketio server in bitbucket pipeline. It failed with the following messages:
...ANSWER
Answered 2021-Oct-24 at 11:25The async_mode parameter takes a string as an argument.
Instead of this:
QUESTION
I have been having some odd issues with docker today. I described one issue @ pathlib: cannot import name 'Sequence' from 'collections'. I didn't really need one of the packages that was causing the break so I took it out. Note that this issue was only happening in docker.
After taking out artifactory package dependency install on docker passed successfully, but am hitting TypeError in my flask app init file when importing:
from flask_socketio import SocketIO, emit which requires eventlet which is where the error comes from:
ANSWER
Answered 2021-Oct-07 at 02:29Searching for the exception, leads to the corresponding eventlet issue: https://github.com/eventlet/eventlet/issues/687
The summary is that eventlet (0.32.0) is currently not compatible with Python 3.10 because it tries to patch types that have become immutable in Python 3.10.
Like with your requirements, it is good practice to be more specific with your Docker dependencies too. Today using the tag 3 for the Python Docker image will give you 3.10.0, unless it is using a cache. In the future it could be a different version. Since there is a compatibility issue with Python 3.10, use Python 3.9 - the currently latest Python 3.9 Docker tag is 3.9.7.
i.e. it should work once you change your first line of the Dockerfile to:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install eventlet
You can use eventlet like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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