python - Python 中的整数错误

Question

所以我制作了一个非常简单的程序，从 99 开始倒数(唱 99 瓶啤酒)，但我总是遇到 2 个错误中的 1 个

#!/usr/bin/env python
print("This program sings the song 99 bottles of beer on the wall")
lim = input("What number do you want it to count down from?")
def sing():
    global lim
    while int(lim) >= 0:
        if int(lim) != 1 or int(lim) != 0:
            print(lim, "bottles of beer on the wall", lim, "bottles of beer")
            print("Take one down pass it around...")
            print(lim, "bottles of beer on the wall")
            input("\nPRESS ENTER\n")
            lim -= 1
sing()
TypeError: unsupported operand type(s) for -=: 'str' and 'int'

然后，当我将 lim -= 1 更改为 int(lim) -= 1 时，它显示 SyntaxError: illegal expression for augmented assignment

Answer 1

您需要将 lim 从字符串转换为整数。试试这个:

lim = int(input("What number do you want it to count down from?"))