'eventlet' invalid or not found

[Anubis]

I am trying to run OvenSpace on Ubuntu with Python3.10 without success. Still getting:
Error: class uri 'eventlet' invalid or not found
I already tried several version of enventlet from 0.28.0 up to 33.1 without success.

Error: class uri 'eventlet' invalid or not found

[Traceback (most recent call last):
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/gunicorn/util.py", line 99, in load_class
    mod = importlib.import_module('.'.join(components))
  File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/gunicorn/workers/geventlet.py", line 10, in <module>
    import eventlet
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/eventlet/__init__.py", line 17, in <module>
    from eventlet import convenience
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/eventlet/convenience.py", line 7, in <module>
    from eventlet.green import socket
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/eventlet/green/socket.py", line 21, in <module>
    from eventlet.support import greendns
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/eventlet/support/greendns.py", line 66, in <module>
    setattr(dns, pkg, import_patched('dns.' + pkg))
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/eventlet/support/greendns.py", line 61, in import_patched
    return patcher.import_patched(module_name, **modules)
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/eventlet/patcher.py", line 132, in import_patched
    return inject(
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/eventlet/patcher.py", line 109, in inject
    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
  File "/home/anubis/OvenSpace/venv/lib/python3.10/site-packages/dns/namedict.py", line 35, in <module>
    class NameDict(collections.MutableMapping):
AttributeError: module 'collections' has no attribute 'MutableMapping'
]

[Quisi]

Same Error over here, but different stacktrace: python3.8

$ sudo pip install eventlet
Requirement already satisfied: eventlet in /usr/local/lib/python3.8/dist-packages (0.31.1)
Requirement already satisfied: greenlet>=0.3 in /usr/local/lib/python3.8/dist-packages (from eventlet) (1.1.1)
Requirement already satisfied: dnspython<2.0.0,>=1.15.0 in /usr/lib/python3/dist-packages (from eventlet) (1.16.0)
Requirement already satisfied: six>=1.10.0 in /usr/local/lib/python3.8/dist-packages (from eventlet) (1.16.0)

and

$ sudo ./run.sh

Error: class uri 'eventlet' invalid or not found:

[Traceback (most recent call last):
  File "/usr/local/lib/python3.8/dist-packages/gunicorn/util.py", line 99, in load_class
    mod = importlib.import_module('.'.join(components))
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 848, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/usr/local/lib/python3.8/dist-packages/gunicorn/workers/geventlet.py", line 20, in <module>
    from eventlet.wsgi import ALREADY_HANDLED as EVENTLET_ALREADY_HANDLED
ImportError: cannot import name 'ALREADY_HANDLED' from 'eventlet.wsgi' (/usr/local/lib/python3.8/dist-packages/eventlet/wsgi.py)
]

[Anubis]

Meanwhile I was successful with Python3.8 + enventlet 0.30.2

[Quisi]

Yes I did a little research:
[https://github.com/benoitc/gunicorn/pull/2581]

It's recommended to use eventlet>=0.31.0 if one uses websockets, because older versions are vulnerable to DoS attack. GHSA-9p9m-jm8w-94p2

but with pip uninstall eventlet and pip install eventlet==0.30.2

it now seems to work