docs: def displayhtml(site_key,
                  language='',
                  theme='light',
                  fallback=False,
                  d_type='image',
                  size='normal'):
      """
      Gets the HTML to display for reCAPTCHA
  
      site_key -- The site key
      language -- The language code for the widget.
      theme -- The color theme of the widget. `light` or `dark`
      fallback -- Old version recaptcha.
      d_type -- The type of CAPTCHA to serve. `image` or `audio`
      size -- The size of the dispalyed CAPTCHA, 'normal' or 'compact'
  
      For more detail, refer to:
        - https://developers.google.com/recaptcha/docs/display
      """
  
      return """
  <script
    src="https://www.google.com/recaptcha/api.js?hl=%(LanguageCode)s&fallback=%(Fallback)s&"
    async="async" defer="defer"></script>
  <div class="g-recaptcha"
      data-sitekey="%(SiteKey)s"
      data-theme="%(Theme)s"
      data-type="%(Type)s"
      data-size="%(Size)s">
  </div>
  <noscript>
    <div  style="width: 302px; height: 480px;">
      <div style="width: 302px; height: 422px; position: relative;">
        <div style="width: 302px; height: 422px; position: relative;">
          <iframe
            src="https://www.google.com/recaptcha/api/fallback?k=%(SiteKey)s&hl=%(LanguageCode)s"
            frameborder="0" scrolling="no"
            style="width: 302px; height:422px; border-style: none;">
          </iframe>
        </div>
        <div
          style="border-style: none; bottom: 12px; left: 25px;
                 margin: 0px; padding: 0px; right: 25px;
                 background: #f9f9f9; border: 1px solid #c1c1c1;
                 border-radius: 3px; height: 60px; width: 300px;">
              <textarea
                id="g-recaptcha-response" name="g-recaptcha-response"
                class="g-recaptcha-response"
                style="width: 250px; height: 40px; border: 1px solid #c1c1c1;
                       margin: 10px 25px; padding: 0px; resize: none;"
                value=""></textarea>
        </div>
      </div>
    </div>
  </noscript>
  """ % {
          'LanguageCode': language,
          'SiteKey': site_key,
          'Theme': theme,
          'Type': d_type,
          'Size': size,
          'Fallback': fallback,
      }