You're reading the documentation of the v1.0. For the latest released version, please have a look at v1.3.

JobStatus

A Job object contains a lot of metadata on top of the computation results a user wants to get. These can be retrieved from the JobStatus object every job contains.

>>> s = my_job.status  # s is a JobStatus instance
>>> if s.completed:
...    print(f"My job lasted {s.duration} seconds.")
My job lasted 37 seconds.