Question

我正在制作一个密码，其中给出了一个文本输入，输出是输入但是在字母表中沿着2移位，例如＆＃34; hi＆＃34;变成了＆＃34; jk＆＃34;。我在包装清单时遇到问题，以便＆＃34; y＆＃34;可以变成＆＃34; b＆＃34;等等。明文是一组输入。关键是2

charset=["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"] # characters to be encrypted

def caesar_encrypt(plaintext,key):

    plaintext = plaintext.upper() # convert plaintext to upper case
    ciphertext = "" # initialise ciphertext as empty string

    for ch in plaintext:
        if ch == " ":
            pass
        else:
            index = charset.index(ch)
            newIndex = index + key
            shiftedCharacter = charset[newIndex]
            ciphertext += shiftedCharacter
            print(ciphertext)
    return ciphertext

Answer 1

只需改变：

newIndex = index + key

要：

newIndex = (index + key) % len(charset)

这样，值将优雅地环绕

Modulo (%) documentation

Answer 2

要转移，你可以试试这个：

import string

converter = {string.ascii_uppercase[i]:string.ascii_uppercase[i+2] for i in range(24)}

在Python中包装列表

2 个答案: