event_trigger does not work inside closures

[assumptionsoup]

def register_pico_light(pico_id, lights):

    @event_trigger('lutron_caseta_button_event')
    def pico_button_test(**kwargs):
        log.error(f"got EVENT_CALL_SERVICE with {kwargs}")

register_pico_light('<my_device_id>', ['light.desk'])

This doesn't work, but placing pico_button_test outside of the register function does. It would be nice if this was possible.

[craigbarratt]

The issue is that when register_pico_light returns (which is immediately), pico_button_test is no longer referenced and is destroyed. You need to save a reference to the inner function.

See the documentation for trigger closures.