old_contents: 
  from __future__ import print_function, unicode_literals
  
  from django.core.management.base import BaseCommand
  from django.apps import apps
  from optparse import make_option
  
  from resize.fields import ResizedImageField
  from resize.utils import resize_image
  
  
  class Command(BaseCommand):
      help = 'Ensures that all ResizedImageFields are available in all required resolutions.'
      option_list = BaseCommand.option_list + (
          make_option('--fail-loud',
              action='store_true',
              dest='fails',
              default=False,
              help='Fail on IOErrors',
          ),
      )
  
      def handle(self, *args, **options):
          print('Looking for resized fields')
  
          for Model in apps.get_models():
              print('  {}.{}'.format(Model._meta.app_label, Model._meta.model_name))
  
              resized_fields = []
              for field in Model._meta.fields:
                  if isinstance(field, ResizedImageField):
                      resized_fields.append(field)
  
              for field in resized_fields:
                  print('    ', field.name)
                  images = (
                      Model
                      .objects
                      .filter(**{'{}__isnull'.format(field.name): False})
                      .exclude(**{field.name: ''})
                      .values_list(field.name, flat=True)
                  )
                  for resolution in field.resolutions:
                      print('      resizing {} images to {}'.format(
                          len(images),
                          resolution,
                      ))
                      for image in images:
                          try:
                              resize_image(field.storage.open(image), resolution)
                          except IOError:
                              print('        Image does not exist', image)
                              if options.fails:
                                  raise
  
          print('Resizing complete')
  
new_contents: 
  from __future__ import print_function, unicode_literals
  
  from django.core.management.base import BaseCommand
  from django.apps import apps
  from optparse import make_option
  
  from resize.fields import ResizedImageField
  from resize.utils import resize_image
  
  
  class Command(BaseCommand):
      help = 'Ensures that all ResizedImageFields are available in all required resolutions.'
      option_list = BaseCommand.option_list + (
          make_option('--fail-loud',
              action='store_true',
              dest='fails',
              default=False,
              help='Fail on IOErrors',
          ),
      )
  
      def handle(self, *args, **options):
          print('Looking for resized fields')
  
          for Model in apps.get_models():
              print('  {}.{}'.format(Model._meta.app_label, Model._meta.model_name))
  
              resized_fields = []
              for field in Model._meta.fields:
                  if isinstance(field, ResizedImageField):
                      resized_fields.append(field)
  
              for field in resized_fields:
                  print('    ', field.name)
                  images = (
                      Model
                      .objects
                      .filter(**{'{}__isnull'.format(field.name): False})
                      .exclude(**{field.name: ''})
                      .values_list(field.name, flat=True)
                  )
                  for resolution in field.resolutions:
                      print('      resizing {} images to {}'.format(
                          len(images),
                          resolution,
                      ))
                      for image in images:
                          try:
                              resize_image(field.storage.open(image), resolution)
                          except IOError:
                              print('        Image does not exist', image)
                              if options['fails']:
                                  raise
  
          print('Resizing complete')
  
subject: fix options dice access