为什么我的代码中出现 Pycharm 操作数错误？

Question

我在 pycharm 中遇到操作数错误，我不明白为什么，因为在 pycharm 即时反馈意义上，代码是正确的。

What is your name?
How old are you?
Traceback (most recent call last):
File "/Users/tiacobb/PycharmProjects/CobbMod2/NameAge.py", line 5, in <module>
year = date.today().year - age
       ~~~~~~~~~~~~~~~~~~^~~~~
TypeError: unsupported operand type(s) for -: 'int' and 'str'

请帮忙。谢谢。

尝试过：

from datetime import date

name = input("What is your name?")
age = input("How old are you?")
year = date.today().year - age

print("Hello" + name + "!" + "You were born in" + str(year) + ".")

Answer 1

默认情况下，

input()

函数返回字符串，而

datetime.year()

返回整数。您应该将输入转换为整数才能进行正确的计算，如下所示：

age = int(input("How old are you?")

这应该可以解决你的错误。