Python 名称错误：名称'；productId'；未在pymysql中定义

我想知道如何解决这个问题。我需要通过Pymysql将数据保存到数据库此脚本给了我错误：

cursor.execute（sql_模板，{“productId”：productId，“productTitle”：productTitle，“salePrice”：salePrice， NameError:未定义名称“productId”

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你如何创建这个“cursor.executemany（sql_模板，数据[“products”]）”？@完全不知道你在说什么，因为我是Python初学者。你能告诉我如何改为修复这个（）吗？

import pymysql.cursors

connection = pymysql.connect(host='localhost',
                                 user='root',
                                 password='Kradz579032!!',
                                 db='aliexpressapidb',
                                 charset='utf8mb4',
                                 cursorclass=pymysql.cursors.DictCursor)
    try:
        with connection.cursor() as cursor:
            sql_template ="""
            INSERT INTO producttable (productId, productTitle, salePrice, originalPrice )
                SELECT * FROM (SELECT %(productId)s, %(productTitle)s, %(salePrice)s, %(originalPrice)s) AS tmp
                WHERE NOT EXISTS (
                    SELECT productId FROM producttable WHERE productId = %(productId)s
                )
                LIMIT 1;
            """

            for product in data['products']:
                print('%s %s %s %s' % (
                product['productId'], product['productTitle'], product['salePrice'], product['originalPrice']))

                cursor.execute(sql_template, {"productId": productId, "productTitle": productTitle, "salePrice": salePrice,
                                              "originalPrice": originalPrice})
            connection.commit()

    finally:
        connection.close()