Support to read and update wifi guest network settings

[frimtec]

Dear @ties

Thanks a lot for the useful compal library.

The only thing I'm missing, is the possibility to update wifi guest network settings. I implemented the feature and tested it with my compal modem.

It would be very nice if you could integrate this feature into your library.

If there are issues with my python style, please forgive me, this is my first python code ;-)

Best regards, Markus

[frimtec]

Sorry I have no clue why these tests are failing - sorry, my python knowledge gap. If you could give me a hint, I fix it.

[ties]

I can also help you fix the linter issues, just let me know :)

[frimtec]

Many thank for your valuable comments. I have changed all mentioned points.

But I have no idea why the tests still fail. I fixed all the reported linter errors, but somehow the tests are still red :-(

Can you help?

Many thanks and reagrds, Markus

[ties]

I'll take a look tonight! :)

[ties]

I ran an autoformat (with black) and it passed. Thanks for the contribution!

[frimtec]

Many thanks for accepting my change.