def choose_task_name(app_name, queue_name, user_chosen=None):
  if not user_chosen:
    user_chosen = _get_random_string() 
  return 'task_%s_%s_%s' % (app_name, queue_name, user_chosen)
Creates a task name that the system can use to address
dataset/ETHPy150Open AppScale/appscale/AppTaskQueue/tq_lib.py/choose_task_name