Python 3.10, Flask-SocketIO and Eventlet Generates Error

[nebhead]

Not quite sure if this is a bug in Flask-SocketIO or with Eventlet, but I'm getting the following after setting up a new system with Python 3.10 (previous working system was using Python 3.8)

ben@pop-os:~/syncthing/Tech-Projects/PiFire$ python app.py 
Traceback (most recent call last):
  File "/home/ben/syncthing/Tech-Projects/PiFire/app.py", line 17, in <module>
    from flask_socketio import SocketIO
  File "/home/ben/.local/lib/python3.10/site-packages/flask_socketio/__init__.py", line 9, in <module>
    from socketio import socketio_manage  # noqa: F401
  File "/home/ben/.local/lib/python3.10/site-packages/socketio/__init__.py", line 9, in <module>
    from .zmq_manager import ZmqManager
  File "/home/ben/.local/lib/python3.10/site-packages/socketio/zmq_manager.py", line 5, in <module>
    import eventlet.green.zmq as zmq
  File "/home/ben/.local/lib/python3.10/site-packages/eventlet/__init__.py", line 17, in <module>
    from eventlet import convenience
  File "/home/ben/.local/lib/python3.10/site-packages/eventlet/convenience.py", line 7, in <module>
    from eventlet.green import socket
  File "/home/ben/.local/lib/python3.10/site-packages/eventlet/green/socket.py", line 21, in <module>
    from eventlet.support import greendns
  File "/home/ben/.local/lib/python3.10/site-packages/eventlet/support/greendns.py", line 66, in <module>
    setattr(dns, pkg, import_patched('dns.' + pkg))
  File "/home/ben/.local/lib/python3.10/site-packages/eventlet/support/greendns.py", line 61, in import_patched
    return patcher.import_patched(module_name, **modules)
  File "/home/ben/.local/lib/python3.10/site-packages/eventlet/patcher.py", line 132, in import_patched
    return inject(
  File "/home/ben/.local/lib/python3.10/site-packages/eventlet/patcher.py", line 109, in inject
    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
  File "/usr/local/lib/python3.10/dist-packages/dns/namedict.py", line 35, in <module>
    class NameDict(collections.MutableMapping):
AttributeError: module 'collections' has no attribute 'MutableMapping'

Here's my modules installed:

ben@pop-os:~$ pip list
Package                Version
---------------------- -------------
async-timeout          4.0.2
bcc                    0.18.0
bidict                 0.22.0
blinker                1.4
Brlapi                 0.8.3
caffeine               2.9.8
certifi                2020.6.20
chardet                4.0.0
chrome-gnome-shell     0.0.0
click                  8.0.3
colorama               0.4.4
command-not-found      0.3
cryptography           3.4.8
cupshelpers            1.0
dbus-python            1.2.18
defer                  1.0.6
Deprecated             1.2.13
distro                 1.7.0
dnspython              1.16.0
eventlet               0.33.1
ewmh                   0.1.6
Flask                  2.1.2
Flask-Mobility         1.1.0
Flask-QRcode           3.1.0
Flask-SocketIO         5.2.0
greenlet               1.1.2
hidpidaemon            18.4.6
httplib2               0.20.2
idna                   3.3
importlib-metadata     4.6.4
influxdb-client        1.30.0
itsdangerous           2.1.2
jeepney                0.7.1
Jinja2                 3.1.2
kernelstub             3.1.4
keyring                23.5.0
language-selector      0.1
launchpadlib           1.10.16
lazr.restfulclient     0.14.4
lazr.uri               1.0.6
louis                  3.20.0
macaroonbakery         1.3.1
MarkupSafe             2.1.1
more-itertools         8.10.0
netaddr                0.8.0
netifaces              0.11.0
oauthlib               3.2.0
olefile                0.46
packaging              21.3
Pillow                 9.0.1
pip                    22.1.2
pop-transition         1.1.2
protobuf               3.12.4
pushbullet.py          0.12.0
pycairo                1.20.1
pycups                 2.0.1
pydbus                 0.6.0
pygame                 2.1.2
PyGObject              3.42.0
PyJWT                  2.3.0
pymacaroons            0.13.0
PyNaCl                 1.5.0
pyparsing              2.4.7
pyRFC3339              1.1
python-apt             2.3.0+ubuntu2
python-dateutil        2.8.2
python-debian          0.1.43ubuntu1
python-engineio        4.3.2
python-magic           0.4.27
python-socketio        5.4.0
python-xlib            0.29
pytz                   2022.1
pyxdg                  0.27
PyYAML                 5.4.1
qrcode                 7.3.1
redis                  4.3.4
repolib                1.5.2
repoman                1.4.0
requests               2.25.1
Rx                     3.2.0
SecretStorage          3.3.1
sessioninstaller       0.0.0
setuptools             62.6.0
six                    1.16.0
systemd-python         234
ubuntu-advantage-tools 27.9
ubuntu-drivers-common  0.0.0
ufw                    0.36.1
urllib3                1.26.5
uuid                   1.30
wadllib                1.3.6
websocket-client       1.3.3
Werkzeug               2.1.2
wheel                  0.37.1
wrapt                  1.14.1
xdg                    5
xkit                   0.0.0
zipp                   1.0.0

[miguelgrinberg]

The best thing you can do when you get obscure errors like this is to google the error to find out if other people had them too. This error is due to you using an old version of the dns package that is incompatible with Python 3.10. Upgrade and I think you will be fine.

[nebhead]

Thank you! This definitely resolves the issue. I should have responded and closed this earlier, as one of my project's contributors pointed this out to me. I'm glad this was a simple fix. :)

BTW - Thank you for all you do and your excellent projects. It enables the rest of us to do so much. Truly appreciated.