'我正在编写一段代码，它以一个问题开始，询问用户是否要对莫尔斯进行编码或解码。根据他们的回答（1或2），它将运行一个if语句，并调用所需的函数。
它将通过user_input（）接收用户的输入，并根据用户选择的编码或解码，返回莫尔斯电码或英语。编码方面可以工作，但我无法让decode_morse（）函数在整个程序中工作。
调用底部的encode_or_decode（）函数时出现错误，同时出现“TypeError：decode_莫尔斯（）缺少1个必需的位置参数：'数据''

# Dictionary representing English to morse code chart
ENG_TO_MORSE_DICT = {'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':'--..', ' ':'/', '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':'--..'
}
# Dictionary representing morse code to English 
MORSE_TO_ENG_DICT = {
        ".-": "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", "/":' '
    }
def encode_or_decode():  
    choice = int(input("Please select 1 to encode to morse, or 2 to decode from morse "))  
    if choice == 1:
     message_to_encode()
    elif choice == 2:
     decode_morse()
    else:
     print("Please select option 1 or option 2")

# Defining a global variable for user's input to be used within multiple functions
def user_input(): 
    global data 
    data = str(input("What message do you want to translate using the Morse cipher? "))
def morse_encrypt(data):  
        for letter in data:  
            print(ENG_TO_MORSE_DICT[letter], end = ' ')

# Defining a function for user-inputted data, using isalpha method to mandate only alphabet letters & spaces as input
def message_to_encode(): 
    user_input()
    if data.replace(' ', '').isalpha():
     morse_encrypt(data)  
    else: 
     print("Only text allowed in message")

def decode_morse():
    results = []
    for item in data.split(' '):
        results.append(MORSE_TO_ENG_DICT.get(item))
    results = ''.join(results)
    return results.lower()
    
def decode_morse(data):
    results = []
    for item in data.split(' '):
        results.append(MORSE_TO_ENG_DICT.get(item))
    results = ''.join(results)
    return results.lower()
encode_or_decode()

我试过单独运行一个类似的decode函数，它有自己的用户输入，运行得很好......但是我不想在主程序中复制用户输入函数，所以我试过使用user_input（_）函数中的data变量，这会引发错误。

MORSE_TO_ENG_DICT = {
        ".-": "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", "/":' '
    }

def decode_morse(morse_data):
    results = []
    for item in morse_data.split(' '):
        results.append(MORSE_TO_ENG_DICT.get(item))
    results = ''.join(results)
    return results.lower()

morse_data = str(input("What morse message do you want to decode using the Morse cipher? "))
print(decode_morse(morse_data))