Returns a Placeholder that represents an output artifact.

It is the same as input(...) function, except it is for output artifacts.

key The key of the output artifact.

A Placeholder that supports

  1. Rendering the whole artifact as text_format. Example: output('model')
  2. Accessing a specific index using [index], if multiple artifacts are associated with the given key. If not specified, default to the first artifact. Example: output('model')[0]
  3. Getting the URI of an artifact through .uri property. Example: output('model').uri or output('model')[0].uri
  4. Getting the URI of a specific split of an artifact using .split_uri(split_name) method. Example: output('examples')[0].split_uri('train')
  5. Getting the value of a primitive artifact through .value property. Example: output('primitive').value
  6. Concatenating with other placeholders or strings. Example: output('model').uri + '/model/' + exec_property('version')