需要帮助，在输出时从我的vigenere密码中删除空格

Question

当我在文本文件中输入“tests are fun”并从中读取以加密它时，我使用python作为键，得到“ICLAGQPPXKTHCB”而不是“ICLAGNGCYBB”。是什么导致了这个问题？当我尝试在转换字符串后添加if语句时，我不断收到错误，指出file1未定义

CODE：

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", ",", ".", "-", " ","\n"]


*def encrypt():
    count = 0
    i = 0
    output = []
    encrypted = []
    keylist = []
    stringlist = []

    **import os
    key = input("Please enter the key you want to use: ")
    fname = input("Enter filename to open and decode: ")
    fname1 = fname + (".txt")
    if os.path.isfile(fname1):
        file1 = open(fname1,'r')
        file1 = file1.read()
        mod = fname + ("_e.txt")
        file2 = open(mod,'w')
    else:
        print()
        print("file doesnt exist try again")
        return()


for index, letter in enumerate(file1):
    if letter.isalpha():
        number = alphabet.index(letter)
        cw = key[index % len(key)]
        shift = alphabet.index(cw)
        nli = (number + shift) % 26
        nl = alphabet[nli]
        output += nl
    else:
        output += letter


   # main function
if __name__ == '__main__':       
       main()*