code: def html_header():
      
      file_path = resources_path('header.html')
  
      with codecs.open(file_path, 'r', encoding='utf8') as header_file:
          content = header_file.read()
          content = content.replace('PATH', resources_path())
      return content
docs: Get a standard html header for wrapping content in.
  
      :returns: A header containing a web page preamble in html - up to and
          including the body open tag.
      :rtype: str