使用递归加密消息，python

Question

我需要编写一个递归函数来加密消息 在python中将所有小写字符转换为下一个字符（z转换为a）。 到目前为止，这是我的代码，但我不知道如何更进一步，或者如何纠正错误。

sentence = input("Enter a message: \n")
letter_number = 0

def encrypt_sentence (s, number):
    if letter_number == len(sentence) - 1:
       return(s)
    else:
        if s[letter_number] == chr(122):
            return encrypt_sentence(chr(ord(s[letter_number])-25), letter_number + 1)
        else:
            return encrypt_sentence(chr(ord(s[letter_number])+1), letter_number + 1)

print("Encrypted message")
print(encrypt_sentence(sentence, letter_number))

Answer 1

我已修复您的代码，现在可以正常运行。

sentence = input("Enter a message: \n")
letter_number = 0

def encrypt_sentence (sentence):
    if sentence:
        if sentence == chr(122):
            return chr(ord(sentence[letter_number])-25)
        else:
            return chr(ord(sentence[letter_number])+1)
print("Encrypted message")
ris = ''
for word in sentence:
    ris += encrypt_sentence(word)
print(ris)