问如何修复Python中"ord()需要一个字符，但找到长度为0的字符串“错误

EN

def main():

    print("This program will encode your messages using a Caesar Cipher")

    message = input("Enter the message: ")

    load = ("")

    codedMessage = ("")

    for i in message:

        load = load + i + "/"

        ''.join(load)

    for ch in load.split("/"):

        codedMessage = codedMessage + chr(ord(ch)+ 2)

    print("The coded message is:", codedMessage)

main()