GitLab

When I try to subclass the Gst.Bin class to, for example, add custom signal handling code, I can no longer create new instances of it with new.

With the code:

import gi

gi.require_version("Gst", "1.0")

from gi.repository import Gst, GLib

Gst.init()

class SubclassBin(Gst.Bin):
    pass

subclass_bin = SubclassBin.new("mybin")

main_loop = GLib.MainLoop.new(context=None, is_running=False)
main_loop.run()

I get the following exception:

TypeError: Bin constructor cannot be used to create instances of a subclass SubclassBin

The message leads me to believe that this is expected behavior, but then it isn't clear to me how to create a new instance of my SubclassBin type. I assume that just using SubclassBin() isn't sufficient, and in my testing it doesn't appear to be.