old_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  from django.db import models
  from django.conf import settings
  from django.utils.safestring import mark_safe
  
  from sorl.thumbnail import get_thumbnail
  
  
  __ALL__ = ('ThumbMixin',)
  
  
  THUMBNAIL_OPTIONS = getattr(
      settings,
      'THUMBNAIL_OPTIONS',
      dict(crop='center', upscaled=False, quality=100))
  
  THUMBNAIL_EMPTY = getattr(settings, 'THUMBNAIL_EMPTY', None)
  
  THUMBNAIL_ALIASES = getattr(settings, 'THUMBNAIL_ALIASES', dict(small='20x20'))
  
  
  class ThumbMixin(object):
      """
      Add property to model for generated thumb.
      Usefull in Django templates:
  
      ::
  
          {{ my_model.get_thumb_56x56.html }}
  
          {{ my_model.get_thumb_small.html }}
  
      Insted of:
  
      ::
          {% thumbnail my_model.pic "56x56" crop="center" as im %}
              <img src="{{ im.url }}" width="56" height="56">
          {% empty %}
              <img src="{{ MISSING_IMAGE }}" width="56" height="56">
          {% endthumbnail %}
      """
      @property
      def image_file_field(self):
          try:
              return self.image
          except AttributeError:
              raise NotImplementedError('Set up image_file_field property')
  
      def __getattr__(self, name):
          prefix = 'get_thumb_'
          if name.startswith(prefix):
              suffix = name.replace(prefix, '')
  
              if THUMBNAIL_ALIASES and suffix in THUMBNAIL_ALIASES:
                  size = THUMBNAIL_ALIASES[suffix]
              else:
                  size = suffix
  
              return self._get_thumb(size)
          raise AttributeError(name)
  
      def _get_thumb(self, size):
          if not self.image_file_field:
              return THUMBNAIL_EMPTY
  
          tmpl = '<img src="{0.url}" width="{0.width}" height="{0.height}">'
          thumb = get_thumbnail(
              self.image_file_field.file, size, **THUMBNAIL_OPTIONS)
          thumb.html = mark_safe(tmpl.format(thumb))
          return thumb
  
new_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  from django.db import models
  from django.conf import settings
  from django.utils.safestring import mark_safe
  
  from sorl.thumbnail import get_thumbnail
  
  
  __ALL__ = ('ThumbMixin',)
  
  
  THUMBNAIL_OPTIONS = getattr(
      settings,
      'THUMBNAIL_OPTIONS',
      dict(crop='center', upscaled=False, quality=100))
  
  THUMBNAIL_EMPTY = getattr(settings, 'THUMBNAIL_EMPTY', None)
  
  THUMBNAIL_ALIASES = getattr(settings, 'THUMBNAIL_ALIASES', dict(small='20x20'))
  
  
  class ThumbMixin(object):
      """
      Add property to model for generated thumb.
      Usefull in Django templates:
  
      ::
  
          {{ my_model.get_thumb_56x56.html }}
  
          {{ my_model.get_thumb_small.html }}
  
      instead of:
  
      ::
          {% thumbnail my_model.pic "56x56" crop="center" as im %}
              <img src="{{ im.url }}" width="56" height="56">
          {% empty %}
              <img src="{{ MISSING_IMAGE }}" width="56" height="56">
          {% endthumbnail %}
      """
      @property
      def image_file_field(self):
          try:
              return self.image
          except AttributeError:
              raise NotImplementedError('Set up image_file_field property')
  
      def __getattr__(self, name):
          prefix = 'get_thumb_'
          if name.startswith(prefix):
              suffix = name.replace(prefix, '')
  
              if THUMBNAIL_ALIASES and suffix in THUMBNAIL_ALIASES:
                  size = THUMBNAIL_ALIASES[suffix]
              else:
                  size = suffix
  
              return self._get_thumb(size)
          raise AttributeError(name)
  
      def _get_thumb(self, size):
          if not self.image_file_field:
              return THUMBNAIL_EMPTY
  
          tmpl = '<img src="{0.url}" width="{0.width}" height="{0.height}">'
          thumb = get_thumbnail(
              self.image_file_field.file, size, **THUMBNAIL_OPTIONS)
          thumb.html = mark_safe(tmpl.format(thumb))
          return thumb
  
subject: fix misstype