def delete(self, doc):
        if doc.id is None:
            raise DatabaseException('Document does not have id')
        if doc.sid is None:
            try:
                rs = self.db.docs.remove({'id': doc.id}, safe=True)
                assert rs['n'] == 1
            except Exception as e:
                raise DatabaseException(e)
            return None
        doc.data = None
        return self.update(doc)
def downloadIndexPage(self, uselessArg1=None):
        logging.info("download index page")
        strIndexHtmlFolderPath = self.SOURCE_HTML_BASE_FOLDER_PATH + u"\\TECHORANGE"
        if not os.path.exists(strIndexHtmlFolderPath):
            os.mkdir(strIndexHtmlFolderPath) #mkdir source_html/TECHORANGE/
        #科技報橘首頁
        self.driver.get("https://buzzorange.com/techorange/")
        #儲存 html
        strIndexHtmlFilePath = strIndexHtmlFolderPath + u"\\index.html"
        self.utility.overwriteSaveAs(strFilePath=strIndexHtmlFilePath, unicodeData=self.driver.page_source)