new_contents: import os
  import base64
  
  def image_as_base64(image_file, format='png'):
      """
      :param `image_file` for the complete path of image.
      :param `format` is format for image, eg: `png` or `jpg`.
      """
      if not os.path.isfile(image_file):
          return None
      
      encoded_string = ''
      with open(image_file, 'rb') as img_f:
          encoded_string = base64.b64encode(img_f.read())
      return 'data:image/%s;base64,%s' % (format, encoded_string)
  
  
  # Example Usage
  
  from django import models
  from django.conf import settings
  
  class Post(models.Model):
      ...
      cover = models.ImageField(upload_to='images/%Y/%m/%d')
      
      def get_cover_base64(self):
          # settings.MEDIA_ROOT = '/path/to/env/projectname/media'
          return image_as_base64(settings.MEDIA_ROOT + self.cover.path)
  
subject: Create image_as_base64.py