为什么这个数字占位符不起作用?

我编写了一个脚本,在命令行中接受用户输入,并执行计算以确定某人的大致年龄。

我不明白的是为什么这部分会出问题( invalid syntax 错误):

print("That makes you approximately %d years old", % (int(year - int(sys.argv[2]))))

全文如下:

from datetime import date
import sys

greeting = sys.argv[1]
year = int(date.today().year)

if __name__ == '__main__':
    print("This script is called: ", sys.argv[0])
    print("Your message is: ", greeting)
    print("Your year of birth is: ", sys.argv[2])
    print("That makes you approximately %d years old", % (int(year - int(sys.argv[2]))))

我错过了什么?