code: def get_authors():
      
      authors = []
      authorfile = os.path.join('doc', 'authors.txt')
      with codecs.open(authorfile, 'r', 'utf-8') as f:
          for line in f:
              line = line.strip()
              if line and not line.startswith(u'#'):
                  authors.append(line)
      return u", ".join(authors)
docs: Read list of authors from a text file, filtering comments.