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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def host_trigger(trg_queue, user=None, group=None, mode=None):
    '''Installs a host trigger for the specified queue.'''
    trigger(trg_queue, user=user, group=group, mode=mode,
            trigger=_c.FSQ_HOSTS_TRIGGER)