So if you remove jon from here and run our program, we get this type error, greet user, missing one required positional argument.

因此，如果您从此处删除 jon 并运行我们的程序， 我们将收到此类型错误，问候用户，缺少一个必需的位置参数。

A type one is a fear of making a mistake, type two error is a fear of missing out on opportunities.

第一类错误是害怕犯错误，第二类错误是害怕错过机会。

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。