title: celerybeat how to pass arguments via scheduler to functions?
body: <p>im having trouble passing arguments to my functions via celerybeat schedule. After searching it looks as though I should be able to pass them with the args command but im getting errors as per the below. can anyone point me in the right direction?</p>
  
  <pre><code>CELERYBEAT_SCHEDULE = {
      'maintenance_mail_1_day': {
          'task': 'home.tasks.maintenance_mail',
          'schedule': crontab(hour='15'),
          'args' : (1),
      },
      'maintenance_mail_3_day': {
          'task': 'home.tasks.maintenance_mail',
          'schedule': crontab(hour='15'),
          'args' : (3),
      },    
      'maintenance_mail_5_day': {
          'task': 'home.tasks.maintenance_mail',
          'schedule': crontab(hour='15'),
          'args' : (5),
      },
      'maintenance_mail_7_day': {
          'task': 'home.tasks.maintenance_mail',
          'schedule': crontab(hour='15'),
          'args' : (7),
      }
  </code></pre>
  
  <p>tasks,py</p>
  
  <pre><code>@app.task
  def maintenance_mail(days):
      return send_maintnance_emails(days)
  </code></pre>