code: def is_valid_image(self, raw_data):
          
          buf = StringIO(raw_data)
          try:
              trial_image = Image.open(buf)
              trial_image.verify()
          except Exception:
              # TODO: Get more specific with this exception handling.
              return False
          return True
docs: Checks if the supplied raw data is valid image data.
  
          :param str raw_data: A string representation of the image data.
          :rtype: bool
          :returns: ``True`` if ``raw_data`` is valid, ``False`` if not.