[Python] Issues with converthing a python dictionary to a GLib Variant

I'm trying to use the NetworkManager DBus method AddAndActivateConnection with the pydbus library to connect to a Wi-Fi network. But it's giving me a lot of trouble in generating the proper GLib Variant based on the format specifier: a{sa{sv}}

from pydbus import SystemBus

bus = SystemBus()
nm = bus.get("org.freedesktop.NetworkManager")

# Find Wi-Fi device
wifi_path = None
for dev_path in nm.GetDevices():
dev = bus.get("org.freedesktop.NetworkManager", dev_path)
if dev.DeviceType == 2:
wifi_path = dev_path
break

if not wifi_path:
raise RuntimeError("No Wi-Fi device found.")

ssid = "MyWiFi"
password = "mypassword123"

settings = {
'connection': {
'id': ssid,
'type': '802-11-wireless',
},
'802-11-wireless': {
'ssid': ssid,
'mode': 'infrastructure',
},
'802-11-wireless-security': {
'key-mgmt': 'wpa-psk',
'psk': password,
},
'ipv4': {
'method': 'auto',
},
'ipv6': {
'method': 'ignore',
}
}

nm.AddAndActivateConnection(settings, wifi_path, "/")


This results in this error in GLib:

Traceback (most recent call last):
File "/root/connect3.py", line 43, in <module>
nm.AddAndActivateConnection(settings, wifi_path, "/")
~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/pydbus/proxy_method.py", line 74, in __call__
self._iface_name, self.__name__, GLib.Variant(self._sinargs, args), GLib.VariantType.new(self._soutargs),
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/gi/overrides/GLib.py", line 189, in __new__
v = creator._create(format_string, value)
File "/usr/lib/python3/dist-packages/gi/overrides/GLib.py", line 150, in _create
builder.add_value(self._create(dup, i))
~~~~~~~~~~~~^^^^^^^^
File "/usr/lib/python3/dist-packages/gi/overrides/GLib.py", line 145, in _create
builder.add_value(self._create(element_type, i))
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/gi/overrides/GLib.py", line 150, in _create
builder.add_value(self._create(dup, i))
~~~~~~~~~~~~^^^^^^^^
File "/usr/lib/python3/dist-packages/gi/overrides/GLib.py", line 145, in _create
builder.add_value(self._create(element_type, i))
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/gi/overrides/GLib.py", line 150, in _create
builder.add_value(self._create(dup, i))
~~~~~~~~~~~~^^^^^^^^
File "/usr/lib/python3/dist-packages/gi/overrides/GLib.py", line 118, in _create
return self._LEAF_CONSTRUCTORS[format](value)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
TypeError: argument value: Expected GLib.Variant, but got str


I've tried using GLib.Variant() to pre package the settings dictionary but I just cannot find a working combination. I've tried debugging it with pdb/pudb but I can't quite grasp what is happing in the library.

I'm just lost at this point, I've been trying everything I can think of but just can't get it to work.

Can someone explain what I am doing wrong?

System info: arch: aarch64 OS: Debian 13 (trixie) Python version: 3.13.5

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