title: Use Django's call command to start celery worker with celerybeat
body: <p>I'd like to start a Django celery worker from a Python script, with celerybeat. On the command line, I would do:</p>
  
  <pre><code>python manage.py celery worker --beat --schedule celerybeat-schedule.db
  </code></pre>
  
  <p>I tried this from a script, but it threw an exception:</p>
  
  <pre><code>from django.core.management import call_command
  call_command("cerlery", "worker", "--beat", "--schedule", "celerybeat-schedule.db")
  </code></pre>