python-networkmanagerはメンテナンス滞り中

はじめに（結論）

NetworkManagerをPythonから叩くためのpython-networkmanagerパッケージはメンテナンスが滞っているので使わない方がいい，というお話です。(2022/12現在）

経緯

Python経由でOS(Linux）のIPアドレスを変更しようとpython-networkmanagerを使ってみました。が，ubuntu22.04（NetworkManage1.36）,OracleLinux8U7（NetworkManager1.40.0）など，幾つかの環境で試してみたところ，ことごとくエラーが出て動きません。
こんなエラーです。

  File "ip.py", line 8, in <module>
    connection = devices[1].ActiveConnection.Connection
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 169, in get_func
    return fixups.to_python(klass, 'Get', name, data, attrib['type'])
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 578, in to_python
    val = fixups.base_to_python(val)
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 648, in base_to_python
    return globals()[classname](val)
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 304, in __init__
    self.uuid = self.GetSettings()['connection']['uuid']
  File "<string>", line 8, in GetSettings
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 619, in to_python
    val['ipv4']['dns'] = [fixups.addr_to_python(addr,socket.AF_INET) for addr in val['ipv4']['dns']]
KeyError: 'dns'

>>> connection = devices[0].ActiveConnection.Connection
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 169, in get_func
    return fixups.to_python(klass, 'Get', name, data, attrib['type'])
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 578, in to_python
    val = fixups.base_to_python(val)
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 648, in base_to_python
    return globals()[classname](val)
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 304, in __init__
    self.uuid = self.GetSettings()['connection']['uuid']
  File "<string>", line 8, in GetSettings
  File "/usr/local/lib/python3.6/site-packages/NetworkManager.py", line 623, in to_python
    val['ipv6']['dns'] = [fixups.addr_to_python(addr,socket.AF_INET6) for addr in val['ipv6']['dns']]
KeyError: 'dns'

python-networkmanagerのGithubを追いかけたところ，NetworkManager>=1.34で発生するバグらしく，プルリクがでていました。しかし，メンテナが「I've mostly abandoned this project（私はこのプロジェクトをほとんど放棄してます）」と発言しており，今後のメンテナンスは厳しそうです。
https://github.com/seveas/python-networkmanager/pull/94