MySQL 链接方法思考

代码：

import subprocess
import os
from dotenv import load_dotenv
import pymysql
from sqlalchemy import create_engine

def check_mysql_service():
    """检查 MySQL 服务是否运行"""
    try:
        result = subprocess.run(
            ["systemctl", "is-active", "mysql"],
            capture_output=True,
            text=True
        )
        if "active" in result.stdout:
            print("✅ MySQL 服务正在运行")
            return True
        else:
            print(f"❌ MySQL 服务未运行: {result.stdout}")
            return False
    except Exception as e:
        print(f"⚠️ 无法检查服务状态: {str(e)}")
        return False

def test_mysql_login(user, password):
    """测试命令行登录"""
    try:
        cmd = f"mysql -u {user} -p{password} -e 'SELECT 1;'"
        result = subprocess