Is there a simple way to create stacked notifications in GNOME Shell?

Question

For example notify-send will create a new notification icon in the tray every time it's executed. I haven't been able to find an easy, preferably scriptable, way of creating these.

Answer 1

notify-send will only create a new notification. However, there are various bindings for libnotify, e.g., to Python (package python-notify). Check out the example provided with the package for replacing the text in a notification:

python /usr/share/doc/python-notify/examples/test-replace.py

Extending this to appending text should be straightforward.