def _find_image_attrs(self, html):
        base_url = self.settings.images
        soup = bs4.BeautifulSoup(html, HTML_PARSER)
        pattern = re.compile('^.*\{\{(.*)\}\}.*$')

        attrs = set()
        for image in soup.find_all(
                'img',
                attrs={
                    'src': (lambda x: x.startswith(base_url) and pattern.match(x))
                }
        ):
            src = image.get('src')
            attr = pattern.match(src).group(1).strip()
            attrs.add(attr)
        return attrs


# Server
dataset/ETHPy150Open KeepSafe/ks-email-parser/email_parser/gui/gui.py/InlineFormRenderer._find_image_attrs/original