old_contents: #!/usr/bin/env python2
  import os
  import sys
  
  if __name__ == "__main__":
      os.environ.setdefault("DJANGO_SETTINGS_MODULE", "<app>.settings")
      from django.core.management import execute_from_command_line
      execute_from_command_line(sys.argv)
  
new_contents: #!/usr/bin/env python2
  import os
  import sys
  
  if __name__ == "__main__":
      os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings.local")
      from django.core.management import execute_from_command_line
      execute_from_command_line(sys.argv)
  
subject: use settings/local.py by default