这个谷歌代码中括号 START/END 注释的目的是什么？

Question

From here :

# [START list_instances]
def list_instances(compute, project, zone):
    result = compute.instances().list(project=project, zone=zone).execute()
    return result['items'] if 'items' in result else None
# [END list_instances]

Can anyone tell me what these are for? They look like editor hints, or perhaps some auto-documentation thing, but I was not able to find information about it.

Answer 1

Looks like "user2357112 supports Monica" has the correct answer - the (Google-internal) documentation system seems to use these section boundaries to extract relevant code samples into the documentation.