code: def _trigger_job(job):
      
      if job.api_instance().is_running():
          return "{0}, {1} is already running".format(job.host, job.name)
      else:
          requests.get(job.api_instance().get_build_triggerurl())
          return "triggering {0}, {1}...".format(job.host, job.name)
docs: trigger a job