class MogoContext():
    def __init__(self,rw='r',db='cmdb2') -> None:
        user='cmdb_user'
        pwd='1q2w3e'
        host='host'
        # self.uri="mongodb://%s:%s@%s" % (quote_plus(user), quote_plus(pwd), host)
        # db 指定要连接的数据库，
        # user/pwd指定数据库的用户密码
        self.client = MongoClient(host=host, port=27017, username=user, password=pwd,authSource=db)
        # conn = MongoClient('mongodb://{}:{}@{}:{}/?authSource={}'.format(user,pwd,host,27017,db))
        self.db=self.client[db]
        
    def __enter__(self):
        return self
    def __exit__(self, exc_type, exc_val, exc_tb):
        self.client.close()

        
if __name__=='__main__':
    with MogoContext('r','cmdb2') as mongo:
        stu=mongo.db['student'].find_one({"Name":"ab"})
        print(str(stu))