用python编写程序，将字符串“Hello Python”、“BigDate”、“SQL”存入到文件“data.dat”中并读出显示。

: orders) {
System.out.println(order.toString());
}
}

// 订单类
static class Order {
private Map好的，以下是 Python 代码实现：

# 写入数据到文件
with open("data.dat", "w<String, Integer> dishes = new HashMap<>();
        private double totalPrice = 0.0;

        public void addDish(String dish,") as file:
    file.write("Hello Python\n")
    file.write("BigData\n")
    file.write("SQL\n")

#  int quantity) {
            dishes.put(dish, quantity);
            totalPrice += menu.get(dish) * quantity;
        }

        public double getTotalPrice() {
            return totalPrice;
        }

        public String toString() {
            StringBuilder sb = new StringBuilder();
            sb.append("订单读取文件中的数据并显示
with open("data.dat", "r") as file:
    data = file.read()
    print(data)

运行结果：

Hello Python
BigData
SQL