Re: Subclass Gio.DBusProxy and UnicodeDecodeError under python 3

[Christoph Reiter <reiter christoph gmail com>]

On Sun, Dec 11, 2016 at 6:12 PM, infirit <infirit gmail com> wrote:
> Hi all,
>
> I subclassed Gio.DBusProxy and overridden the do_g_properties_changed
> virtual function. In there I emit my own signal that consumers of the
> proxy can connect to. I have created a minimal example of what I am
> doing which you can find on [1].
>
> The code from [1] runs perfectly fine under python2.7 with no
> UnicodeDecodeError at any point, the situation under Python 3.4 however
> is different. See below an example error. I narrowed it down to
> overriding do_g_properties_changed, without that the error goes away.
>
>   *connected function* /org/bluez/hci0/dev_7C_2F_80_3B_AF_AB RSSI -64
>   UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb8 in position
> 0: invalid start byte
>
> The strange thing is that it does not generate a traceback so I am not
> entirely sure how to proceed with this. It also does not seem to result
> in issues however my gut tells me not to ignore it. Anyone know what is
> going on with this?

Under Python 2 text gets passed to Python as is (utf-8 encoded) while
under Python 3 things get decoded to unicode code points. I suspect
there is some invalid utf-8 involved which you should see in data
getting passed to do_g_properties_changed under py2.

I've tested your code (with adjusting the device path) and it seems to
work fine under py3 here.