So that is where we're calculating the age, and right below that you can see the type of error. In this case, we have a type error, and here's the message. Unsupported operand types for subtraction. Int and str.

这就是我们计算年龄的地方，就在下面你可以看到错误的类型。在这种情况下，我们有一个类型错误，这里是信息。不支持的操作数类型减法。 Int和str。