PYTHON语法错误吗？

Question

当我尝试运行该程序时，我不断收到“无效语法”消息。 在“ else”语句之后，它以红色突出显示“ age”。 我不确定自己做错了什么。

age = float(input('How old are you? '))
citizen = float(input('How long have you been an American citizen? '))
if age >= 30 and citizen >= 9:
    print('You are eligible to become a US Senator and a House Representative!')
else age < 30 >= 25 and citizen < 9 >= 7:
    print('You are only eligible to become a House Representative.')
if age < 25 or citizen < 7:
    print('You are not eligible to become a US Senator or a House Represenatative.')

Answer 1

else age < 30 >= 25 and citizen < 9 >= 7:

是语法错误。 在else语句之后，除了:之外，您不能有其他任何else 。

也许您想要一个elif子句¹ ？

elif 30 > age >= 25 and 9 > citizen >= 7:
    ...

^{1请注意，我还必须稍微改变一下您的值，以了解您正在执行的运算符链接...}

Answer 2

else age < 30 >= 25 and citizen < 9 >= 7:的else应当更改为elif 。