search.py 文件源码

def _extract_description(self, result):
        desc_td = result.findNext('td')
        if not desc_td:
            self._maybe_raise(ParseError, "Description tag in Google search result was not found", result)
            return None

        desc_strs = []
        def looper(tag):
            if not tag: return
            for t in tag:
                try:
                    if t.name == 'br': break
                except AttributeError:
                    pass

                try:
                    desc_strs.append(t.string)
                except AttributeError:
                    desc_strs.append(t)

        looper(desc_td)
        looper(desc_td.find('wbr')) # BeautifulSoup does not self-close <wbr>

        desc = ''.join(s for s in desc_strs if s)
        return self._html_unescape(desc)