缺少1个必需的位置参数：“密钥”加密

Question

alphabet = ' abcdefghijklmnopqrstuvwxyz'
cryptMode = input("[E]ncrypt|[D]ecrypt: ").upper()
if cryptMode not in ['E','D']:
    print("Error: mode is not Found!"); raise SystemExit
startMessage = input("Write the message: ").upper()
try:rotKey = int(input("Write the key: "))
except ValueError: print("Only numbers!"); raise SystemExit
def encryptDecrypt(alphabet,mode,message,Key,final = ""):
    for c in message:
        if mode == 'E': 
            final += alphabet[(alphabet.index(c) + Key)%(len(alphabet))]
        else: 
            final += alphabet[(alphabet.index(c) - Key)%(len(alphabet))]
    return final
print("Final message:",encryptDecrypt(cryptMode, startMessage, rotKey))

获取此错误

打印（“最终消息：”，加密解密（cryptMode，startMessage，rotKey）） TypeError:encryptDecrypt（）缺少1个必需的位置参数：“Key”\

我无法理解我做错了什么

Answer 1

def encryptDecrypt(alphabet,mode,message,Key,final = ""):需要4个参数和第五个可选参数

您仅使用三个参数调用它：encryptDecrypt(cryptMode, startMessage, rotKey)，缺少alphabet

更正：

encryptDecrypt(alphabet, cryptMode, startMessage, rotKey)