old_contents: """
  set_default_site.py
  """
  import socket
  from optparse import make_option
  
  from django.core.management.base import NoArgsCommand, CommandError
  
  
  class Command(NoArgsCommand):
      option_list = NoArgsCommand.option_list + (
          make_option('--name', dest='site_name', default=None,
                      help='Use this as site name.'),
          make_option('--domain', dest='site_domain', default=None,
                      help='Use this as site domain.'),
          make_option('--system-fqdn', dest='set_as_system_fqdn', default=False,
                      action="store_true", help='Use the systems FQDN (Fully Qualified Domain Name) as name and domain. Can be used in combination with --name'),
      )
      help = "Set parameters of the default django.contrib.sites Site"
      requires_model_validation = True
  
      def handle_noargs(self, **options):
          from django.contrib.sites.models import Site
  
          try:
              site = Site.objects.get(pk=1)
          except Site.DoesNotExist:
              raise CommandError("Default site with pk=1 does not exist")
          else:
              name = options.get("site_name", None)
              domain = options.get("site_domain", None)
              if options.get('set_as_system_fqdn', False):
                  domain = socket.getfqdn()
                  if not domain:
                      raise CommandError("Cannot find systems FQDN")
                  if name is None:
                      name = domain
  
              update_kwargs = {}
              if name and name != site.name:
                  update_kwargs["name"] = name
  
              if domain and domain != site.domain:
                  update_kwargs["domain"] = domain
  
              if update_kwargs:
                  Site.objects.filter(pk=1).update(**update_kwargs)
                  site = Site.objects.get(pk=1)
                  print "Updated default site. You might need to restart django as sites are cached aggressively."
              else:
                  print "Nothing to update (need --name, --domain and/or --system-fqdn)"
  
              print "Default Site:"
              print "\tid = %s" % site.id
              print "\tname = %s" % site.name
              print "\tdomain = %s" % site.domain
  
new_contents: """
  set_default_site.py
  """
  import socket
  from optparse import make_option
  
  from django.core.management.base import NoArgsCommand, CommandError
  
  
  class Command(NoArgsCommand):
      option_list = NoArgsCommand.option_list + (
          make_option('--name', dest='site_name', default=None,
                      help='Use this as site name.'),
          make_option('--domain', dest='site_domain', default=None,
                      help='Use this as site domain.'),
          make_option('--system-fqdn', dest='set_as_system_fqdn', default=False,
                      action="store_true", help='Use the systems FQDN (Fully Qualified Domain Name) as name and domain. Can be used in combination with --name'),
      )
      help = "Set parameters of the default django.contrib.sites Site"
      requires_model_validation = True
  
      def handle_noargs(self, **options):
          from django.contrib.sites.models import Site
  
          try:
              site = Site.objects.get(pk=1)
          except Site.DoesNotExist:
              raise CommandError("Default site with pk=1 does not exist")
          else:
              name = options.get("site_name", None)
              domain = options.get("site_domain", None)
              if options.get('set_as_system_fqdn', False):
                  domain = socket.getfqdn()
                  if not domain:
                      raise CommandError("Cannot find systems FQDN")
                  if name is None:
                      name = domain
  
              update_kwargs = {}
              if name and name != site.name:
                  update_kwargs["name"] = name
  
              if domain and domain != site.domain:
                  update_kwargs["domain"] = domain
  
              if update_kwargs:
                  Site.objects.filter(pk=1).update(**update_kwargs)
                  site = Site.objects.get(pk=1)
                  print("Updated default site. You might need to restart django as sites are cached aggressively.")
              else:
                  print("Nothing to update (need --name, --domain and/or --system-fqdn)")
  
              print("Default Site:")
              print("\tid = %s" % site.id)
              print("\tname = %s" % site.name)
              print("\tdomain = %s" % site.domain)
  
subject: fix python3 error