old_contents: """Load and parse configuration file."""
  import yaml
  from io import open
  
  CONFIG = {}
  
  def load_config(config_file):
      """Loads a configuration file."""
      config = {}
      if type(config_file) is file:
          config.update(yaml.load(config_file, Loader=yaml.FullLoader) or {})
          return config
      else:
          try:
              with open(config_file, 'r') as f:
                  content = yaml.load(f, Loader=yaml.FullLoader)
                  config.update(content)
                  return content
          except IOError as e:
              e.message = 'Could not open configuration file "{}".'.format(config_file)
              raise e
  
  def load_yaml_config(config_file):
      """Load YAML config file
  
      :param str config_file: The path to the configuration file.
  
      :returns: A dict of the parsed config file.
      :rtype: dict
      :raises IOError: If the config file cannot be opened.
      """
      if type(config_file) is file:
          CONFIG.update(yaml.load(config_file, Loader=yaml.FullLoader) or {})
          return CONFIG
      else:
          try:
              with open(config_file, 'r') as f:
                  content = yaml.load(f, Loader=yaml.FullLoader)
                  CONFIG.update(content)
                  return content
          except IOError as e:
              e.message = 'Could not open configuration file "{}".'.format(config_file)
              raise e
  
new_contents: """Load and parse configuration file."""
  import yaml
  from io import open
  
  CONFIG = {}
  
  def load_config(config_file):
      """Loads a configuration file."""
      config = {}
      try:
          with open(config_file, 'r') as f:
              content = yaml.load(f, Loader=yaml.FullLoader)
              config.update(content)
              return content
      except IOError as e:
          e.message = 'Could not open configuration file "{}".'.format(config_file)
          raise e
  
  def load_yaml_config(config_file):
      """Load YAML config file
  
      :param str config_file: The path to the configuration file.
  
      :returns: A dict of the parsed config file.
      :rtype: dict
      :raises IOError: If the config file cannot be opened.
      """
      try:
          with open(config_file, 'r') as f:
              content = yaml.load(f, Loader=yaml.FullLoader)
              CONFIG.update(content)
              return content
      except IOError as e:
          e.message = 'Could not open configuration file "{}".'.format(config_file)
          raise e
  
subject: Remove unused file type check