eventlet issue with ubuntu 20.04 running RYU

Question

I really need your kind help with this problem.

I recently upgraded ubuntu 18.04 to 20.04 and with it, I can't run the ryu controller that is based on python because it shows this import error:

ImportError: cannot import name 'ALREADY_HANDLED' from 'eventlet.wsgi'(/usr/local/lib/python3.8/dist-packages/eventlet/wsgi.py)

I already tried installing eventlet 30.2 and upgraded gunicorn to last version 20.1

I've been researching for days for different versions of eventlet 30.2 and gunicorn but still nothing. Please help.

I tried the eventlet 30.2.

Answer 1

Altering to eventlet == 0.30.2 probably fixes the issue.

sudo pip3 uninstall eventlet
sudo pip3 install eventlet==0.30.2