from pymongo import MongoClientimport asyncioimport xlwtimport jsonclass Mongodb_Transfer_Excel():    def __init__(self, db_name, table_name, ip='127.0.0.1', port=27017, excel_format=None, mongodb_type=None):        """        :param db_name: 数据库名        :param table_name: 数据表名        :param ip: IP        :param port: 端口        :param excel_format: 数据需求的字段：{'content': 0, 'field': 1}        """        self.ip = ip        self.port = port        self.db_name = db_name        self.table_name = table_name        self.excel_format = excel_format  # excel_format如：{'content': 0, 'field': 1}        self.wbk = xlwt.Workbook()        self.sheet = self.wbk.add_sheet(self.table_name)        self.mongodb_type = mongodb_type        self.loop = asyncio.get_event_loop()    def db_conn(self):        """        创建数据库连接        :return:        """        conn = MongoClient(self.ip, self.port)        db = conn[self.db_name]  # 连接mydb数据库，没有则自动创建        conn = db[self.table_name]  # 使用test_set集合，没有则自动创建        return conn    def find_data(self):        """        获取mongdb数据        :return:        """        rows = self.db_conn().find()        return rows    def create_excel(self):        """        根据self.excel_format生成execl        :return:        """        if self.excel_format:            excel_format = self.excel_format        else:            excel_format = {
   'content': 0, 'content1': 1, 'title': 2, "weixin_code": 3, "weixin_name": 4, "type": 5,  'pubtime': 6}            self.excel_format = excel_format        for key, value in excel_format.items():            self.sheet.write(0, value,  key)        self.wbk.save('{}.xls'.format(self.table_name))    async def parse_rows(self, i, row):                dic = dict()                dic['cloumn'] = i                if 'user' in row:                    user_info = row.get('user')                    if 'description' in user_info:                        dic['description'] = user_info['description']                    if 'screenName' in user_info:                        dic['screenName'] = user_info['screenName']                if 'result' in row:                    result = row['result']                    if isinstance(result, str):                        result = json.loads(result)                    content = result.get('content').replace('\n', '')                    if len(content) > 2000:                        dic['content'] = content[0: 2000]                        dic['conten1'] = content[2000: ]                    else:                        dic['content'] = content                    if 'title' in result:                        dic['title'] = result.get('title')                    if 'event' in result:                        event = result.get('event')                        if isinstance(event, str):                            event = json.loads(event)                        if 'weixin_code' in event:                            dic['weixin_code'] = event.get('weixin_code')                        if 'weixin_name' in event:                            dic['weixin_name'] = event.get('weixin_name')                        if 'type' in event:                            dic['type'] = event.get('type')                        if 'url' in event:                            dic['url'] = event.get('url')                    if 'pubtime' in result:                        dic['pubtime'] = result.get('pubtime')                await asyncio.sleep(1)                self.parse_dic(dic)    def parse_dic(self, dic):                for key, value in dic.items():                    if key in self.excel_format:                        # print(key)                        self.write_excel(key, value, dic['cloumn'])    def write_excel(self, key, value, columns):        """        写入数据        :param dic: 数据字典        :param columns: 插入excel的行        :return:        """        self.sheet.write(columns, int(self.excel_format.get(key)), value)    def save_excel(self):        self.wbk.save('{}.xls'.format(self.table_name))    def run(self):        self.create_excel()        rows = self.find_data()        tasks = [self.parse_rows(i + 1, row) for i, row in enumerate(rows)]        self.loop.run_until_complete(asyncio.wait(tasks))        self.loop.close()        self.save_excel()if __name__ == '__main__':    excel_format = {}  # 指定excel文件格式如：{'content': 0, 'field': 1}    mongodb_type = 'weibo'  # 或者man_sheng_huo    obj = Mongodb_Transfer_Excel(db_name='db_name', table_name='table_name', mongodb_type=mongodb_type,                                 excel_format=excel_format)    obj.run()