启动mysql系统错误

[mysqld]
port = 3306
datadir = /var/lib/mysql
socket = /var/run/mysqld/mysqld.sock

sudo netstat -tuln | grep 3306

sudo chown -R mysql:mysql /var/lib/mysql
sudo chmod -R 755 /var/lib/mysql

sudo systemctl stop mysql
sudo rm -rf /var/lib/mysql/*
sudo mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
sudo systemctl start mysql

import mysql.connector

try:
    conn = mysql.connector.connect(
        host="localhost",
        user="your_username",
        password="your_password",
        database="your_database"
    )
    cursor = conn.cursor()
    cursor.execute("SELECT * FROM your_table")
    results = cursor.fetchall()
    for row in results:
        print(row)
except mysql.connector.Error as err:
    print(f"Error: {err}")
finally:
    if conn.is_connected():
        cursor.close()
        conn.close()