Question

我正在尝试创建一个caeser密码python代码，并在输入'y'时继续获取IndexError：list index超出范围。但是当我输入类似'hello'的东西时没有问题。我不一定在寻找解决方案但是我喜欢解释，因为我真的不理解它。

    plaintext=raw_input("Enter message: ")
    convert=plaintext.lower()
    alphabet= ["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"]  
    key=2
    cipher=""

    for i in convert:
        if i in alphabet:
            cipher+=alphabet[(alphabet.index(i)+key%len(alphabet))] 
    print("Your decrypted message is: " +cipher)

Answer 1

您需要在此处移动( )：

cipher+=alphabet[(alphabet.index(i)+key)%len(alphabet)]

记住运营商的优先权。

您只是将%应用于密钥

Python：IndexError：列表索引超出范围Caeser Cipher

1 个答案: