python - 类型错误:必须是 str，而不是类型

Question

我正在编写一个可以掷骰子的程序。这是我的代码:

import random

Number_of_sides = input("How many sides should the die have?")
Number_of_sides = int

print("OK, the number of sides on the die will be" + Number_of_sides)

number = random.randit(1, Number_of_sides)

print(number)

当我运行该程序时出现此错误:

File "die.py", line 6, in <module>
    print("OK, the number of sides on the die will be" + Number_of_sides)
TypeError: must be str, not type

我的问题是:出了什么问题，我该如何解决？以后如何避免？

Answer 1

您没有正确地将字符串转换为 int。

import random

number_of_sides = input("How many sides should the die have?")
number_of_sides_int = int(number_of_sides)

print("OK, the number of sides on the die will be " + number_of_sides)

number = random.randint(1, number_of_sides_int)

print(number)

不是将字符串转换为 int，而是将变量 number_of_sides 转换为 Python 类型 int。这就是错误可能令人困惑的原因，但 Python int 是 python type。