import pymysql
import sqlite3

class DBManager():
    #实例化数据库管理对象，并连接数据库
    def __init__(self,ip,prot,user,passwd):
        pass

    #检查设备ID是否在数据库？
    def checkDevID(self,cID):
        pass

    def test(self):
        # 建立数据库连接
        conn = pymysql.connect(
            host='localhost',
            port=3306,
            user='username',
            password='password',
            database='database_name'
        )

        # 创建游标对象
        cursor = conn.cursor()

        # 执行 SQL 查询
        query = "SELECT * FROM table_name"
        cursor.execute(query)

        # 获取查询结果
        result = cursor.fetchall()

        # 输出结果
        for row in result:
            print(row)

        # 关闭游标和连接
        cursor.close()
        conn.close()