类型错误："int"对象不可下标，python

Question

以下是我的代码

two_digit_number = input("Type a two digit number: ")
new_two_digit_number = int(two_digit_number)
print(new_two_digit_number[0] + new_two_digit_number[1])"""

如果我在two_digit_number代码上输入27，我想打印&;9&;对答案。但是出现TypeError: 'int' object is not subscriptable

我已经知道正确的代码，但不明白为什么出现上面的错误…

Answer 1

错误:'int'对象不可下标- Python

new_two_digit_number为int。不是string。如果您想访问单个数字，您需要转换为str，然后将它们加在一起作为ints:

two_digit_number = input("Type a two digit number: ")
new_two_digit_number = int(two_digit_number)
new_two_digit_number = str(two_digit_number)
print(int(new_two_digit_number[0]) + int(new_two_digit_number[1]))

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或者您可以使用列表推导式在一行中完成所有操作:

def add_digits(num: str) -> int:
"""Converts a string (input), to an integer sum of all the numbers in the string"""
return sum(int(x) for x in str(int(num)))