凱撒密碼：如何從字典中打印*所有*輸入字母？

Question

當我運行這與輸入「ABC」，只會打印「F」，而不是「高清」，我想不通爲什麼...幫助

code = raw_input("Enter your code: ") 

translation = {"a": "d", "b": "e", "c": "f", "d": "g", "e": "h", "f": "i", "g": "j", "h": "k", "i": "l", "j": "m", "k": "n", "l": "o", "m": "p", "n": "q", "o": "r", "p": "s", "q": "t", "r": "u", "s": "v", "t": "w", "u": "x", "v": "y", "w": "z", "x": "a", "y": "b", "z": "c"} 

lettered_code = list(code) 

def translate(lettered_code): 
    for letters in lettered_code: 
     newanswer = translation[letters] 
    return newanswer 

print translate(lettered_code) 

Answer 1

你只能回到過去的翻譯，您每次迭代都會輸入newanswer = translation[letters]，因此您只能看到最後一個。

每一個新的字符添加到字符串：

def translate(lettered_code): 
    new_answer = "" # set variable outside the for loop to an empty string 
    for letters in lettered_code: 
     new_answer += translation[letters] # add each translated letter to new_answer 
    return new_answer # return all joined letters 

你不需要lettered_code = list(code)，你可以通過遍歷字符串直接使剛及格code給你的函數。

您也可以使用join和創建轉換字符的列表，並將它們連接成單個字符串list comprehension：

def translate(lettered_code): 
    "".join([translation[letters] for letters in lettered_code ]) 

Answer 2

你早回來，你要

def translate(lettered_code): 
    return [translation[letter] for letter in lettered_code]