How to reference a script from another script?

Configuration
1

I created a custom script, and want to call it within another script. From programming point of view: call a private function from another function inside the same class.

I though it would be as easy as follows, but it does not work:
scripts.yaml:

alexa_setvolume:
  sequence:
    - service: media_player.volume_set
      data_template: 
        entity_id: media_player.my_echo_dot
        volume_level: "{{ alexa_volume }}"

alexa_announce:
  sequence:
    - service: alexa_setvolume
      data:
        alexa_volume: 0.6
...

Result:

Invalid config for [script]: Service alexa_setvolume does not match format <domain>.<name> for dictionary value

Why?

2

In the announce script, alexa_setvolume should be script.alexa_setvolume. That’s what the error is saying–the format for a service is domain.name.