new_contents: import subprocess
  
  from django.conf import settings
  MY_APPS = settings.MY_APPS
  
  COMMAND_FORMAT = "python manage.py dumpdata {app} > core/fixtures/{app}.json"
  
  def update_fixtures():
      for app in MY_APPS:
          command = COMMAND_FORMAT.format(app=app)
          print(command)
          subprocess.check_output(command, shell=True)
  
  if __name__ == '__main__':
      update_fixtures()
subject: Add script to update course content.