我应该如何退出这个python程序？

Question

quit2 = True
while quit2 == True:
    delete = input('\nIf you would like to delete a guest, enter their guest number. '
                   '\nIf you would  like to skip this step press Enter.')

if isinstance(delete, int):
    list[delete].remove()
else:
    break

顺便说一下，我不能使用quit2=''，也不能使用quit2

Answer 1

在if中的while循环中使用break，这样其余代码将继续，但如果要终止它：import sys并使用系统出口（）

Answer 2

假设if语句不在while循环中是问题的格式问题，那么这段代码的唯一问题是if语句条件永远不会为真，因为input()总是返回string，而不是int。你知道吗

与其使用if/else块，不如试试try/except块：

while True:  # Don't need 'quit2', since it's never going to change
    delete = input('\nIf you would like to delete a guest, enter their guest number. '
                   '\nIf you would  like to skip this step press Enter.')

    try:
        delete = int(delete)
        list[delete].remove()
    except ValueError:  # if int(delete) fails because the string isn't numeric, exit loop
        break
    except IndexError:  # if list index out of range, let them try again
        print("That guest doesn't exist. Please try again.")
        continue