fixed

gistfile1.py

#DEFAULT_FILE_STORAGE = 'storages.backends.s3boto.S3BotoStorage'

image_request = requests.get(url)
content_type=image_request.headers['content-type']
filename = 'blarg'
  if content_type == 'image/jpeg':
      filename = "blarg.jpg" 
  if content_type == 'image/png':
      filename = "blarg.png" 
  image_file = SimpleUploadedFile(
      filename,
      image_request.content,
      content_type=content_type
  )                                                                                                                                                                                                         
  print image_file.__dict__
  avtr.avatar.save(image_file.name, image_file) # avtr.avatar is an ImageField
  avtr.save()