c 获取mysql错误信息

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = $conn->query($sql);

if (!$result) {
    echo "查询失败: " . $conn->error;
} else {
    // 处理查询结果
}

$conn->close();
?>

import mysql.connector

try:
    mydb = mysql.connector.connect(
        host="localhost",
        user="username",
        password="password",
        database="myDB"
    )

    mycursor = mydb.cursor()

    mycursor.execute("SELECT id, firstname, lastname FROM MyGuests")

    myresult = mycursor.fetchall()

except mysql.connector.Error as err:
    print("Something went wrong: {}".format(err))

finally:
    if mydb.is_connected():
        mycursor.close()
        mydb.close()