python简单实现计算过期时间的方法

def time_passed(value):  now = datetime.now()  past = now - value  if past.days:    return u'%s天前' % past.days  mins = past.seconds / 60  if mins < 60:    return u'%s分钟前' % mins  hours = mins / 60  return u'%s小时前' % hours