docs: def _parse_exclude(exclude_file):
      '''
      Parse an exclude file.
  
      Returns a dict as defined in gentoolkit.eclean.exclude.parseExcludeFile
      '''
      if os.path.isfile(exclude_file):
          exclude = excludemod.parseExcludeFile(exclude_file, lambda x: None)
      else:
          exclude = dict()
      return exclude