text: """
  Settings.
  """
  import importlib
  
  
  def import_from_string(val):
      """
      Attempt to import a class from a string representation.
      """
      try:
          parts = val.split('.')
          module_path, class_name = '.'.join(parts[:-1]), parts[-1]
          m = importlib.import_module(module_path)
          return getattr(m, class_name)
      except (ImportError, AttributeError) as e:
          msg = 'Could not import {}, {}, {}'.format(val, e.__class__.__name__, e)
          raise ImportError(msg)
  
  
  DEFAULTS = {
      'OBTAIN_JWT_ALLOWED_FAIL_ATTEMPTS': 3,
      'CACHE_BACKEND_CLASS': 'drf_requests_jwt.backends.file_cache.FileCacheBackend'
  }
  