text: 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,
                  "THUMBOR_ENABLED": settings.THUMBOR_ENABLED
              }
          )
  