Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita", error on executing the the python script with pygtk module

Question

I recently added the the Macbuntu theme in my Ubuntu 16.04 from the site [Noobslab][1], In am learning GTK+ for Python too (PyGTK), earlier when I ran the test programs I made run quietly without showing any error in stderr stream but after I installed the theme, I am getting a warning

(radio_button.py:6696): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",
(radio_button.py:6696): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",

For example when I ran the script of radio_button.py.

I want to fix this error, without uninstalling the theme.

Solution 1

I had the same issue

sudo apt install gnome-themes-standard

Fixed the issue.

Solution 2

In order to remove this warning (you can live with it, it is not causing any problem) the solution above did not worked for me. I had to, on top of installing gnome-themes-standard, do the following: $ sudo apt-get install gnome-themes-extra gnome-themes-extra:i386

In my case was the 32 bit architecture version that did the trick.

Comments

[DK Bose]

Is the Macbuntu theme compatible with the gtk3 version in 16.04 (3.18)? Does it need an engine? Does your system have the appropriate engine?

[Cerin]

Thanks. I wasn't getting any explicit error, but some Gnome programs were looking like old X apps on my fresh Ubuntu install when using the default "Adwaita" theme, and this fixed it.

[Carlo Wood]

Doesn't fix it for me.

[Carlo Wood]

And also this isn't fixing it.

[mae]

E: Unable to locate package gnome-themes-extra:i386