Python: error with a relative path

I’m trying to build a snap for a little soft I’ve developped long time ago wih Gtk3 and Python.
It’s Coulr:

I don’t need any plugs or big changes in the code but I’ve a problem with only one path.
Here’s the snapcraft.yaml.
The app is just one file:
And here’s the

When I launch the snap I’ve this error:

self.logo = GdkPixbuf.Pixbuf.new_from_file(logo_path)
GLib.Error: g-file-error-quark: Failed to open file 'assets/coulr.png': No such file or directory (4)

Here’s the concerned part of the code:

logo_path = "assets/{name}.png".format(
self.save_file = "{}/.config/{}.json".format(home_path,
self.logo = GdkPixbuf.Pixbuf.new_from_file(logo_path)

While the coulr.png file is really stored in /snap/coulr/current/lib/python3.5/site-packages/coulr/assets

Maybe I don’t understand how to call this file in python…

Thank’s in advance!

I’ve fixed the problem in this commit: