constants.py

NOTIFICATION_REFEREE_DEADLINE = 'referee_task_deadline'
NOTIFICATION_REFEREE_OVERDUE = 'referee_task_overdue'

NOTIFICATION_TYPES = (
    (NOTIFICATION_REFEREE_DEADLINE, 'Refereeing Task is approaching its deadline'),
    (NOTIFICATION_REFEREE_OVERDUE, 'Refereeing Task is overdue')
)