old_contents: from collections import namedtuple
  
  
  Configuration = namedtuple(
      'Configuration',
      ['API_ROOT', 'AUTH', 'VALIDATE_SSL', 'TIMEOUT', 'APPEND_SLASH']
  )
  
  
  class Factory:
      def __init__(self, config_dict):
          self._config_dict = config_dict
  
      def create(self) -> Configuration:
          return Configuration(
              API_ROOT=self.API_ROOT,
              AUTH=self.AUTH,
              VALIDATE_SSL=self.VALIDATE_SSL,
              TIMEOUT=self.TIMEOUT,
              APPEND_SLASH=self.APPEND_SLASH,
          )
  
      @property
      def API_ROOT(self):
          return self._config_dict['API_ROOT']
  
      @property
      def AUTH(self):
          return self._config_dict.get('AUTH', None)
  
      @property
      def VALIDATE_SSL(self):
          return self._config_dict.get('VALIDATE_SSL', True)
  
      @property
      def TIMEOUT(self):
          return self._config_dict.get('TIMEOUT', 1)
  
      @property
      def APPEND_SLASH(self):
          return self._config_dict.get('APPEND_SLASH', True)
  
new_contents: from collections import namedtuple
  
  
  Configuration = namedtuple(
      'Configuration',
      ['API_ROOT', 'AUTH', 'VALIDATE_SSL', 'TIMEOUT', 'APPEND_SLASH']
  )
  
  
  class Factory:
      def __init__(self, config_dict):
          self._config_dict = config_dict
  
      def create(self) -> Configuration:
          return Configuration(
              API_ROOT=self.API_ROOT,
              AUTH=self.AUTH,
              VALIDATE_SSL=self.VALIDATE_SSL,
              TIMEOUT=self.TIMEOUT,
              APPEND_SLASH=self.APPEND_SLASH,
          )
  
      @property
      def API_ROOT(self):
          url = self._config_dict['API_ROOT']
          if not url.endswith('/'):
              url += '/'
          return url
  
      @property
      def AUTH(self):
          return self._config_dict.get('AUTH', None)
  
      @property
      def VALIDATE_SSL(self):
          return self._config_dict.get('VALIDATE_SSL', True)
  
      @property
      def TIMEOUT(self):
          return self._config_dict.get('TIMEOUT', 1)
  
      @property
      def APPEND_SLASH(self):
          return self._config_dict.get('APPEND_SLASH', True)
  
subject: Append slash to API root if needed.