如何使用python和sqlite3从csv中只更新数据库中的两列，而不接触其他列中的数据？

import csv
import sqlite3

conn = sqlite3.connect('your_database.db')
cursor = conn.cursor()

cursor.execute('''CREATE TABLE IF NOT EXISTS your_table (
                    column1_type column1_name,
                    column2_type column2_name,
                    column3_type column3_name,
                    ...
                    )''')

with open('your_csv_file.csv', 'r') as file:
    csv_data = csv.reader(file)
    next(csv_data)  # 跳过CSV文件的标题行
    for row in csv_data:
        cursor.execute('''UPDATE your_table
                          SET column1_name = ?,
                              column2_name = ?
                          WHERE primary_key_column = ?''',
                       (row[column1_index], row[column2_index], row[primary_key_index]))

conn.commit()
conn.close()