Perhaps more comparable to the comprehensions shown in this post would be generator comprehensions:

    list(p.first_name + " " + p.last_name for p in people)
    dict((p.first_name + " " + p.last_name, p) for p in people)
    set(j.organization for p in people for j in p.jobs)
    print(", ".join(p.first_name + " " + p.last_name for p in people))

(Of course, Python has sugar for the first three.)