Question

我是Python的新手。这是我的第三个项目，我面临一些障碍。在这里，我有一个Caesar密码项目。它似乎做我需要做的一切，只接受大写字母，没有特殊字符，没有小写字母，没有空格。

但是，我有两个问题：

它必须只接受1到26之间的数字。不幸的是，它也接受的数字甚至高于26。
无论密钥大小如何，它只会将字母换1位数。理想情况下，它必须根据输入的密钥大小移动字母： this is where problem(s) occurring

如果有人能提供解决方案或提出解决上述问题的建议，那将是非常有帮助的。非常感谢你的时间和关注！

这是我的代码：

MAX_NUMBER_KEY = 26
def getMode():
    while True:
        print('Please make your selection from the following "E" for encryption or "D" for decryption:')
        mode = raw_input()
        if mode in 'E D'.split():
            return mode
        else:
            print('Error! Please try again and make sure to choose only "E" or "D"!')
def getText():
    while True:
        print('Enter your text that you would like to encrypt or decrypt:')
        text = raw_input()
        if text.isalpha() and text.isupper():
            return text
        else:
            print('Error! No spaces, no special characters or numbers! Please only use letters!')
def getKey():
    key = 0
    while True:
        print('Enter your number key for "K" (1-%s)' % (MAX_NUMBER_KEY))
        key = int(raw_input().isdigit())
        if (key >= 1 and key <= MAX_NUMBER_KEY):
            return key
        else:
           print('Error! Please try again and choose only numbers between (1-26)!')
def getEncryptedMessage(mode, text, key):
    if mode[0] == 'D':
        key = -key
    encrypted = ''
    for each in text:
        if each.isalpha():
            num = ord(each)
            num += key
            if each.isupper():
                if num > ord('Z'):
                    num -= 26
                elif num < ord('A'):
                    num += 26
            encrypted += chr(num)
        else:
            encrypted += each
    return encrypted
mode = getMode()
message = getText()
key = getKey()
print('Your encrypted message is:')
print(getEncryptedMessage(mode, message, key))

Answer 1

在getKey()中，raw_input().isdigit()返回一个布尔值，因此通过将其转换为int，您将分别执行int(True)或int(False)，分别为1和0

Python Caesar密码缺陷

1 个答案: