old_contents: from django import forms
  from django.conf import settings
  from django.template.loader import render_to_string
  
  
  class MultipleUpload(forms.FileInput):
      def render(self, name, value, attrs=None):
          _value = ""
          if value:
              _value = "{0}{1}".format(settings.MEDIA_URL, value)
          return render_to_string("admin/opps/images/multiupload.html",
                                  {"name": name, "value": _value,
                                   "STATIC_URL": settings.STATIC_URL})
  
  
  class CropExample(forms.TextInput):
      def render(self, name, value, attrs=None):
          return render_to_string(
              "admin/opps/images/cropexample.html",
              {"name": name, "value": value,
               'STATIC_URL': settings.STATIC_URL,
               "THUMBOR_SERVER": settings.THUMBOR_SERVER,
               "THUMBOR_MEDIA_URL": settings.THUMBOR_MEDIA_URL})
  
new_contents: from django import forms
  from django.conf import settings
  from django.template.loader import render_to_string
  
  
  class MultipleUpload(forms.FileInput):
      def render(self, name, value, attrs=None):
          _value = ""
          _height = ""
          _width = ""
          if value:
              _value = "{0}{1}".format(settings.MEDIA_URL, value)
              _height = value.height
              _width = value.width
          return render_to_string("admin/opps/images/multiupload.html",
                                  {"name": name, "value": _value,
                                   'height': _height,
                                   'width': _width,
                                   "STATIC_URL": settings.STATIC_URL})
  
  
  class CropExample(forms.TextInput):
      def render(self, name, value, attrs=None):
          return render_to_string(
              "admin/opps/images/cropexample.html",
              {"name": name, "value": value,
               'STATIC_URL': settings.STATIC_URL,
               "THUMBOR_SERVER": settings.THUMBOR_SERVER,
               "THUMBOR_MEDIA_URL": settings.THUMBOR_MEDIA_URL})
  
subject: Add _height/_width on widget MultipleUpload