报错了 报错了？？

Answer 1

import mysql.connector

# 连接到数据库
conn = mysql.connector.connect(
    host="主机名或IP地址",
    user="数据库用户名",
    password="数据库密码",
    database="数据库名"
)
# 创建一个游标对象
mycursor = conn.cursor()

# 定义查询字符串
query_str = "SELECT yu, rt FROM tablename"

try:
    mycursor.execute(query_str)
    results = mycursor.fetchall()
    for row in results:
        yu, rt = row
        print(f"yu: {yu}, rt: {rt}")
except Exception as e:
   
    print(f"An error occurred: {e}")
finally:
    # 关闭游标和连接
    mycursor.close()
    conn.close()

Answer 2